2100201101021 has 4 divisors (see below), whose sum is σ = 2115310461600. Its totient is φ = 2085091740444.

The previous prime is 2100201100997. The next prime is 2100201101041. The reversal of 2100201101021 is 1201011020012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100201101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100201100993 and 2100201101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100201101041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7554680081 + ... + 7554680358.

It is an arithmetic number, because the mean of its divisors is an integer number (528827615400).

Almost surely, 2^{2100201101021} is an apocalyptic number.

It is an amenable number.

2100201101021 is a deficient number, since it is larger than the sum of its proper divisors (15109360579).

2100201101021 is a wasteful number, since it uses less digits than its factorization.

2100201101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15109360578.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2100201101021 its reverse (1201011020012), we get a palindrome (3301212121033).

The spelling of 2100201101021 in words is "two trillion, one hundred billion, two hundred one million, one hundred one thousand, twenty-one".