2120001012100 has 36 divisors (see below), whose sum is σ = 4603230086224. Its totient is φ = 847479134880.

The previous prime is 2120001012083. The next prime is 2120001012109. The reversal of 2120001012100 is 12101000212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2120001012109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6352362 + ... + 6677761.

Almost surely, 2^{2120001012100} is an apocalyptic number.

2120001012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120001012100 is an abundant number, since it is smaller than the sum of its proper divisors (2483229074124).

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

2120001012100 is a wasteful number, since it uses less digits than its factorization.

2120001012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031764 (or 13031757 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2120001012100 its reverse (12101000212), we get a palindrome (2132102012312).

The spelling of 2120001012100 in words is "two trillion, one hundred twenty billion, one million, twelve thousand, one hundred".