351112405202421 has 8 divisors (see below), whose sum is σ = 469160996442240. Its totient is φ = 233569375382112.

The previous prime is 351112405202381. The next prime is 351112405202441. The reversal of 351112405202421 is 124202504211153.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 351112405202421 - 2¹⁷ = 351112405071349 is a prime.

It is a super-2 number, since 2×351112405202421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351112405202441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126390353256 + ... + 126390356033.

It is an arithmetic number, because the mean of its divisors is an integer number (58645124555280).

Almost surely, 2^{351112405202421} is an apocalyptic number.

It is an amenable number.

351112405202421 is a deficient number, since it is larger than the sum of its proper divisors (118048591239819).

351112405202421 is a wasteful number, since it uses less digits than its factorization.

351112405202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252780709755.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 351112405202421 its reverse (124202504211153), we get a palindrome (475314909413574).

The spelling of 351112405202421 in words is "three hundred fifty-one trillion, one hundred twelve billion, four hundred five million, two hundred two thousand, four hundred twenty-one".