31123222300020 has 96 divisors (see below), whose sum is σ = 92238407614080. Its totient is φ = 7819268359680.

The previous prime is 31123222300013. The next prime is 31123222300061. The reversal of 31123222300020 is 2000322232113.

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 31123222300020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75210987 + ... + 75623666.

It is an arithmetic number, because the mean of its divisors is an integer number (960816745980).

Almost surely, 2^{31123222300020} is an apocalyptic number.

31123222300020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31123222300020 is an abundant number, since it is smaller than the sum of its proper divisors (61115185314060).

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

31123222300020 is a wasteful number, since it uses less digits than its factorization.

31123222300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150834865 (or 150834863 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31123222300020 its reverse (2000322232113), we get a palindrome (33123544532133).

The spelling of 31123222300020 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, three hundred thousand, twenty".