31013121110212 has 6 divisors (see below), whose sum is σ = 54272961942878. Its totient is φ = 15506560555104.

The previous prime is 31013121110201. The next prime is 31013121110263. The reversal of 31013121110212 is 21201112131013.

It can be written as a sum of positive squares in only one way, i.e., 29727967856896 + 1285153253316 = 5452336^2 + 1133646^2 .

It is a super-3 number, since 3×31013121110212³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31013121110212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3876640138773 + ... + 3876640138780.

Almost surely, 2^{31013121110212} is an apocalyptic number.

It is an amenable number.

31013121110212 is a deficient number, since it is larger than the sum of its proper divisors (23259840832666).

31013121110212 is a wasteful number, since it uses less digits than its factorization.

31013121110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7753280277557 (or 7753280277555 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31013121110212 its reverse (21201112131013), we get a palindrome (52214233241225).

The spelling of 31013121110212 in words is "thirty-one trillion, thirteen billion, one hundred twenty-one million, one hundred ten thousand, two hundred twelve".