31111234412120 has 32 divisors (see below), whose sum is σ = 70003234778400. Its totient is φ = 12443968013568.

The previous prime is 31111234412101. The next prime is 31111234412129. The reversal of 31111234412120 is 2121443211113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31111234412120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111234412129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15470405 + ... + 17365364.

It is an arithmetic number, because the mean of its divisors is an integer number (2187601086825).

Almost surely, 2^{31111234412120} is an apocalyptic number.

It is an amenable number.

31111234412120 is an abundant number, since it is smaller than the sum of its proper divisors (38892000366280).

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

31111234412120 is a wasteful number, since it uses less digits than its factorization.

31111234412120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32859467 (or 32859463 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 31111234412120 its reverse (2121443211113), we get a palindrome (33232677623233).

The spelling of 31111234412120 in words is "thirty-one trillion, one hundred eleven billion, two hundred thirty-four million, four hundred twelve thousand, one hundred twenty".