10031431212 has 144 divisors (see below), whose sum is σ = 28240692480. Its totient is φ = 2976739200.

The previous prime is 10031431187. The next prime is 10031431253. The reversal of 10031431212 is 21213413001.

It is a super-2 number, since 2×10031431212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6352239 + ... + 6353817.

It is an arithmetic number, because the mean of its divisors is an integer number (196115920).

Almost surely, 2^10031431212 is an apocalyptic number.

10031431212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10031431212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14120346240).

10031431212 is an abundant number, since it is smaller than the sum of its proper divisors (18209261268).

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

10031431212 is a wasteful number, since it uses less digits than its factorization.

10031431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 10031431212 its reverse (21213413001), we get a palindrome (31244844213).

The spelling of 10031431212 in words is "ten billion, thirty-one million, four hundred thirty-one thousand, two hundred twelve".