2100000201021 has 32 divisors (see below), whose sum is σ = 3140551440000. Its totient is φ = 1386755159040.

The previous prime is 2100000201007. The next prime is 2100000201037. The reversal of 2100000201021 is 1201020000012.

It is a de Polignac number, because none of the positive numbers 2^k-2100000201021 is a prime.

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 = 2100000200994 and 2100000201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100000201521) 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, 28127581 + ... + 28202141.

It is an arithmetic number, because the mean of its divisors is an integer number (98142232500).

Almost surely, 2^{2100000201021} is an apocalyptic number.

It is an amenable number.

2100000201021 is a deficient number, since it is larger than the sum of its proper divisors (1040551238979).

2100000201021 is a wasteful number, since it uses less digits than its factorization.

2100000201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84426 (or 84420 counting only the distinct ones).

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

Adding to 2100000201021 its reverse (1201020000012), we get a palindrome (3301020201033).

The spelling of 2100000201021 in words is "two trillion, one hundred billion, two hundred one thousand, twenty-one".