2100011011021 has 24 divisors (see below), whose sum is σ = 2639506849280. Its totient is φ = 1635456350880.

The previous prime is 2100011011013. The next prime is 2100011011073. The reversal of 2100011011021 is 1201101100012.

It is not a de Polignac number, because 2100011011021 - 2³ = 2100011011013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100011010989 and 2100011011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100011011321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822340 + ... + 2208226.

Almost surely, 2^{2100011011021} is an apocalyptic number.

It is an amenable number.

2100011011021 is a deficient number, since it is larger than the sum of its proper divisors (539495838259).

2100011011021 is a wasteful number, since it uses less digits than its factorization.

2100011011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387705 (or 1387694 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2100011011021 its reverse (1201101100012), we get a palindrome (3301112111033).

The spelling of 2100011011021 in words is "two trillion, one hundred billion, eleven million, eleven thousand, twenty-one".