2100021120012 has 24 divisors (see below), whose sum is σ = 4900078549296. Its totient is φ = 700002858688.

The previous prime is 2100021119993. The next prime is 2100021120031. The reversal of 2100021120012 is 2100211200012.

It is an interprime number because it is at equal distance from previous prime (2100021119993) and next prime (2100021120031).

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

It is a self number, because there is not a number n which added to its sum of digits gives 2100021120012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093998 + ... + 2929994.

It is an arithmetic number, because the mean of its divisors is an integer number (204169939554).

Almost surely, 2^{2100021120012} is an apocalyptic number.

It is an amenable number.

2100021120012 is an abundant number, since it is smaller than the sum of its proper divisors (2800057429284).

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

2100021120012 is a wasteful number, since it uses less digits than its factorization.

2100021120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045337 (or 1045335 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2100021120012 its reverse (2100211200012), we get a palindrome (4200232320024).

It can be divided in two parts, 2100021 and 120012, that multiplied together give a palindrome (252027720252).

The spelling of 2100021120012 in words is "two trillion, one hundred billion, twenty-one million, one hundred twenty thousand, twelve".