351113215112421 has 4 divisors (see below), whose sum is σ = 468150953483232. Its totient is φ = 234075476741612.

The previous prime is 351113215112381. The next prime is 351113215112489. The reversal of 351113215112421 is 124211512311153.

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 351113215112421 - 2²³ = 351113206723813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351113215112921) 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, 58518869185401 + ... + 58518869185406.

It is an arithmetic number, because the mean of its divisors is an integer number (117037738370808).

Almost surely, 2^{351113215112421} is an apocalyptic number.

It is an amenable number.

351113215112421 is a deficient number, since it is larger than the sum of its proper divisors (117037738370811).

351113215112421 is a wasteful number, since it uses less digits than its factorization.

351113215112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117037738370810.

The product of its digits is 7200, while the sum is 33.

Adding to 351113215112421 its reverse (124211512311153), we get a palindrome (475324727423574).

The spelling of 351113215112421 in words is "three hundred fifty-one trillion, one hundred thirteen billion, two hundred fifteen million, one hundred twelve thousand, four hundred twenty-one".