2100000222021 has 16 divisors (see below), whose sum is σ = 3015436257344. Its totient is φ = 1292285833344.

The previous prime is 2100000221983. The next prime is 2100000222037. The reversal of 2100000222021 is 1202220000012.

It is not a de Polignac number, because 2100000222021 - 2¹⁵ = 2100000189253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100000221988 and 2100000222006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100000222041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2034090 + ... + 2887476.

It is an arithmetic number, because the mean of its divisors is an integer number (188464766084).

Almost surely, 2^{2100000222021} is an apocalyptic number.

It is an amenable number.

2100000222021 is a deficient number, since it is larger than the sum of its proper divisors (915436035323).

2100000222021 is a wasteful number, since it uses less digits than its factorization.

2100000222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916500.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2100000222021 its reverse (1202220000012), we get a palindrome (3302220222033).

The spelling of 2100000222021 in words is "two trillion, one hundred billion, two hundred twenty-two thousand, twenty-one".