31020122220100 has 144 divisors (see below), whose sum is σ = 75692214763200. Its totient is φ = 10955279301120.

The previous prime is 31020122220049. The next prime is 31020122220119. The reversal of 31020122220100 is 102222102013.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188971 + ... + 7878829.

It is an arithmetic number, because the mean of its divisors is an integer number (525640380300).

Almost surely, 2^{31020122220100} 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 31020122220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37846107381600).

31020122220100 is an abundant number, since it is smaller than the sum of its proper divisors (44672092543100).

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

31020122220100 is a wasteful number, since it uses less digits than its factorization.

31020122220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690022 (or 7690015 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31020122220100 its reverse (102222102013), we get a palindrome (31122344322113).

The spelling of 31020122220100 in words is "thirty-one trillion, twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred".