31424011212 has 72 divisors (see below), whose sum is σ = 80638125568. Its totient is φ = 9517258080.

The previous prime is 31424011207. The next prime is 31424011217. The reversal of 31424011212 is 21211042413.

It is an interprime number because it is at equal distance from previous prime (31424011207) and next prime (31424011217).

It is not an unprimeable number, because it can be changed into a prime (31424011217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3315993 + ... + 3325455.

Almost surely, 2^31424011212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31424011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40319062784).

31424011212 is an abundant number, since it is smaller than the sum of its proper divisors (49214114356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31424011212 is a wasteful number, since it uses less digits than its factorization.

31424011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11779 (or 11766 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31424011212 its reverse (21211042413), we get a palindrome (52635053625).

The spelling of 31424011212 in words is "thirty-one billion, four hundred twenty-four million, eleven thousand, two hundred twelve".