31103132220212 has 48 divisors (see below), whose sum is σ = 60058639354560. Its totient is φ = 14003213672448.

The previous prime is 31103132220191. The next prime is 31103132220227. The reversal of 31103132220212 is 21202223130113.

It is a super-2 number, since 2×31103132220212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7324838 + ... + 10763805.

It is an arithmetic number, because the mean of its divisors is an integer number (1251221653220).

Almost surely, 2^{31103132220212} is an apocalyptic number.

It is an amenable number.

31103132220212 is a deficient number, since it is larger than the sum of its proper divisors (28955507134348).

31103132220212 is a wasteful number, since it uses less digits than its factorization.

31103132220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18089472 (or 18089470 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31103132220212 its reverse (21202223130113), we get a palindrome (52305355350325).

Subtracting from 31103132220212 its reverse (21202223130113), we obtain a palindrome (9900909090099).

The spelling of 31103132220212 in words is "thirty-one trillion, one hundred three billion, one hundred thirty-two million, two hundred twenty thousand, two hundred twelve".