31000020101212 has 6 divisors (see below), whose sum is σ = 54250035177128. Its totient is φ = 15500010050604.

The previous prime is 31000020101207. The next prime is 31000020101231. The reversal of 31000020101212 is 21210102000013.

It is a super-2 number, since 2×31000020101212² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000020101192 and 31000020101201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875002512648 + ... + 3875002512655.

Almost surely, 2^{31000020101212} is an apocalyptic number.

It is an amenable number.

31000020101212 is a deficient number, since it is larger than the sum of its proper divisors (23250015075916).

31000020101212 is a wasteful number, since it uses less digits than its factorization.

31000020101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750005025307 (or 7750005025305 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31000020101212 its reverse (21210102000013), we get a palindrome (52210122101225).

The spelling of 31000020101212 in words is "thirty-one trillion, twenty million, one hundred one thousand, two hundred twelve".