20310111021000 has 128 divisors (see below), whose sum is σ = 67095049282560. Its totient is φ = 5097439616000.

The previous prime is 20310111020977. The next prime is 20310111021001. The reversal of 20310111021000 is 12011101302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20310111021001) 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, 199067736 + ... + 199169735.

It is an arithmetic number, because the mean of its divisors is an integer number (524180072520).

Almost surely, 2^{20310111021000} is an apocalyptic number.

20310111021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310111021000 is an abundant number, since it is smaller than the sum of its proper divisors (46784938261560).

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

20310111021000 is a wasteful number, since it uses less digits than its factorization.

20310111021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398237512 (or 398237498 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20310111021000 its reverse (12011101302), we get a palindrome (20322122122302).

The spelling of 20310111021000 in words is "twenty trillion, three hundred ten billion, one hundred eleven million, twenty-one thousand".