3121054421 has 4 divisors (see below), whose sum is σ = 3139095372. Its totient is φ = 3103013472.

The previous prime is 3121054381. The next prime is 3121054441. The reversal of 3121054421 is 1244501213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1244501213 = 15581 ⋅79873.

It can be written as a sum of positive squares in 2 ways, for example, as 3006328900 + 114725521 = 54830^2 + 10711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121054421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121054441) 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, 9020216 + ... + 9020561.

It is an arithmetic number, because the mean of its divisors is an integer number (784773843).

Almost surely, 2^3121054421 is an apocalyptic number.

It is an amenable number.

3121054421 is a deficient number, since it is larger than the sum of its proper divisors (18040951).

3121054421 is a wasteful number, since it uses less digits than its factorization.

3121054421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18040950.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 3121054421 is about 55866.3979597754. The cubic root of 3121054421 is about 1461.3933063411.

Adding to 3121054421 its reverse (1244501213), we get a palindrome (4365555634).

The spelling of 3121054421 in words is "three billion, one hundred twenty-one million, fifty-four thousand, four hundred twenty-one".