31401224443421 has 32 divisors (see below), whose sum is σ = 38227441190400. Its totient is φ = 25179445057536.

The previous prime is 31401224443367. The next prime is 31401224443429. The reversal of 31401224443421 is 12434442210413.

It is not a de Polignac number, because 31401224443421 - 2¹⁸ = 31401224181277 is a prime.

It is a super-2 number, since 2×31401224443421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401224443429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23953256 + ... + 25230158.

It is an arithmetic number, because the mean of its divisors is an integer number (1194607537200).

Almost surely, 2^{31401224443421} is an apocalyptic number.

It is an amenable number.

31401224443421 is a deficient number, since it is larger than the sum of its proper divisors (6826216746979).

31401224443421 is a wasteful number, since it uses less digits than its factorization.

31401224443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278173.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 31401224443421 its reverse (12434442210413), we get a palindrome (43835666653834).

The spelling of 31401224443421 in words is "thirty-one trillion, four hundred one billion, two hundred twenty-four million, four hundred forty-three thousand, four hundred twenty-one".