3100120421 has 4 divisors (see below), whose sum is σ = 3100376844. Its totient is φ = 3099864000.

The previous prime is 3100120409. The next prime is 3100120433. The reversal of 3100120421 is 1240210013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240210013 = 7 ⋅177172859.

It is an interprime number because it is at equal distance from previous prime (3100120409) and next prime (3100120433).

It can be written as a sum of positive squares in 2 ways, for example, as 2415722500 + 684397921 = 49150^2 + 26161^2 .

It is a cyclic number.

It is not a de Polignac number, because 3100120421 - 2²⁶ = 3033011557 is a prime.

It is a super-2 number, since 2×3100120421² = 19221493249402434482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3100120396 and 3100120405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3100120321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109130 + ... + 134571.

It is an arithmetic number, because the mean of its divisors is an integer number (775094211).

Almost surely, 2^3100120421 is an apocalyptic number.

It is an amenable number.

3100120421 is a deficient number, since it is larger than the sum of its proper divisors (256423).

3100120421 is a wasteful number, since it uses less digits than its factorization.

3100120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256422.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3100120421 is about 55678.7250303022. The cubic root of 3100120421 is about 1458.1186157788.

Adding to 3100120421 its reverse (1240210013), we get a palindrome (4340330434).

The spelling of 3100120421 in words is "three billion, one hundred million, one hundred twenty thousand, four hundred twenty-one".