351115411121421 has 4 divisors (see below), whose sum is σ = 468153881495232. Its totient is φ = 234076940747612.

The previous prime is 351115411121417. The next prime is 351115411121513. The reversal of 351115411121421 is 124121114511153.

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 351115411121421 - 2² = 351115411121417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351115411121821) 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, 58519235186901 + ... + 58519235186906.

It is an arithmetic number, because the mean of its divisors is an integer number (117038470373808).

Almost surely, 2^{351115411121421} is an apocalyptic number.

It is an amenable number.

351115411121421 is a deficient number, since it is larger than the sum of its proper divisors (117038470373811).

351115411121421 is a wasteful number, since it uses less digits than its factorization.

351115411121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117038470373810.

The product of its digits is 4800, while the sum is 33.

Adding to 351115411121421 its reverse (124121114511153), we get a palindrome (475236525632574).

The spelling of 351115411121421 in words is "three hundred fifty-one trillion, one hundred fifteen billion, four hundred eleven million, one hundred twenty-one thousand, four hundred twenty-one".