2100021133321 has 16 divisors (see below), whose sum is σ = 2129038055424. Its totient is φ = 2071195467264.

The previous prime is 2100021133297. The next prime is 2100021133361. The reversal of 2100021133321 is 1233311200012.

It is a cyclic number.

It is not a de Polignac number, because 2100021133321 - 2²¹ = 2100019036169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100021133361) 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, 61644925 + ... + 61678981.

It is an arithmetic number, because the mean of its divisors is an integer number (133064878464).

Almost surely, 2^{2100021133321} is an apocalyptic number.

It is an amenable number.

2100021133321 is a deficient number, since it is larger than the sum of its proper divisors (29016922103).

2100021133321 is a wasteful number, since it uses less digits than its factorization.

2100021133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36840.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2100021133321 its reverse (1233311200012), we get a palindrome (3333332333333).

The spelling of 2100021133321 in words is "two trillion, one hundred billion, twenty-one million, one hundred thirty-three thousand, three hundred twenty-one".