31120111020212 has 12 divisors (see below), whose sum is σ = 54764441182080. Its totient is φ = 15473127825336.

The previous prime is 31120111020197. The next prime is 31120111020217. The reversal of 31120111020212 is 21202011102113.

It is a happy number.

It is a super-2 number, since 2×31120111020212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120111020217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21731920388 + ... + 21731921819.

It is an arithmetic number, because the mean of its divisors is an integer number (4563703431840).

Almost surely, 2^{31120111020212} is an apocalyptic number.

It is an amenable number.

31120111020212 is a deficient number, since it is larger than the sum of its proper divisors (23644330161868).

31120111020212 is a wasteful number, since it uses less digits than its factorization.

31120111020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43463842390 (or 43463842388 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 31120111020212 its reverse (21202011102113), we get a palindrome (52322122122325).

The spelling of 31120111020212 in words is "thirty-one trillion, one hundred twenty billion, one hundred eleven million, twenty thousand, two hundred twelve".