31421204012 has 36 divisors (see below), whose sum is σ = 60455490480. Its totient is φ = 14278793760.

The previous prime is 31421204011. The next prime is 31421204021. The reversal of 31421204012 is 21040212413.

It is a super-2 number, since 2×31421204012² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31421204011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3444914 + ... + 3454022.

It is an arithmetic number, because the mean of its divisors is an integer number (1679319180).

Almost surely, 2^31421204012 is an apocalyptic number.

It is an amenable number.

31421204012 is a deficient number, since it is larger than the sum of its proper divisors (29034286468).

31421204012 is a wasteful number, since it uses less digits than its factorization.

31421204012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16262 (or 16249 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31421204012 its reverse (21040212413), we get a palindrome (52461416425).

The spelling of 31421204012 in words is "thirty-one billion, four hundred twenty-one million, two hundred four thousand, twelve".