3121233013421 has 4 divisors (see below), whose sum is σ = 3285508435200. Its totient is φ = 2956957591644.

The previous prime is 3121233013373. The next prime is 3121233013471. The reversal of 3121233013421 is 1243103321213.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 3121233013421 - 2¹⁸ = 3121232751277 is a prime.

It is a super-2 number, since 2×3121233013421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121233013471) 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, 82137710861 + ... + 82137710898.

It is an arithmetic number, because the mean of its divisors is an integer number (821377108800).

Almost surely, 2^{3121233013421} is an apocalyptic number.

It is an amenable number.

3121233013421 is a deficient number, since it is larger than the sum of its proper divisors (164275421779).

3121233013421 is a wasteful number, since it uses less digits than its factorization.

3121233013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164275421778.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 3121233013421 its reverse (1243103321213), we get a palindrome (4364336334634).

The spelling of 3121233013421 in words is "three trillion, one hundred twenty-one billion, two hundred thirty-three million, thirteen thousand, four hundred twenty-one".