31111210022020 has 96 divisors (see below), whose sum is σ = 66926786572800. Its totient is φ = 12141655916544.

The previous prime is 31111210021993. The next prime is 31111210022027. The reversal of 31111210022020 is 2022001211113.

It is a junction number, because it is equal to n+sod(n) for n = 31111210021985 and 31111210022003.

It is not an unprimeable number, because it can be changed into a prime (31111210022027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6021133477 + ... + 6021138643.

It is an arithmetic number, because the mean of its divisors is an integer number (697154026800).

Almost surely, 2^{31111210022020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31111210022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33463393286400).

31111210022020 is an abundant number, since it is smaller than the sum of its proper divisors (35815576550780).

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

31111210022020 is a wasteful number, since it uses less digits than its factorization.

31111210022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597 (or 11595 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31111210022020 its reverse (2022001211113), we get a palindrome (33133211233133).

The spelling of 31111210022020 in words is "thirty-one trillion, one hundred eleven billion, two hundred ten million, twenty-two thousand, twenty".