1321420101 has 4 divisors (see below), whose sum is σ = 1761893472. Its totient is φ = 880946732.

The previous prime is 1321420099. The next prime is 1321420103. The reversal of 1321420101 is 1010241231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1321420099) and next prime (1321420103).

It is a cyclic number.

It is not a de Polignac number, because 1321420101 - 2¹ = 1321420099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321420103) 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, 220236681 + ... + 220236686.

It is an arithmetic number, because the mean of its divisors is an integer number (440473368).

Almost surely, 2^1321420101 is an apocalyptic number.

It is an amenable number.

1321420101 is a deficient number, since it is larger than the sum of its proper divisors (440473371).

1321420101 is an equidigital number, since it uses as much as digits as its factorization.

1321420101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440473370.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1321420101 is about 36351.3424924032. The cubic root of 1321420101 is about 1097.3545522907.

Adding to 1321420101 its reverse (1010241231), we get a palindrome (2331661332).

The spelling of 1321420101 in words is "one billion, three hundred twenty-one million, four hundred twenty thousand, one hundred one".