2120001100020 has 96 divisors (see below), whose sum is σ = 6983533065600. Its totient is φ = 532078705152.

The previous prime is 2120001099989. The next prime is 2120001100039. The reversal of 2120001100020 is 200011000212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2120001099975 and 2120001100011.

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, 115459290 + ... + 115477649.

It is an arithmetic number, because the mean of its divisors is an integer number (72745136100).

Almost surely, 2^{2120001100020} is an apocalyptic number.

2120001100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120001100020 is an abundant number, since it is smaller than the sum of its proper divisors (4863531965580).

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

2120001100020 is a wasteful number, since it uses less digits than its factorization.

2120001100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230936974 (or 230936966 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2120001100020 its reverse (200011000212), we get a palindrome (2320012100232).

The spelling of 2120001100020 in words is "two trillion, one hundred twenty billion, one million, one hundred thousand, twenty".