1021000021211 has 16 divisors (see below), whose sum is σ = 1032002143200. Its totient is φ = 1010026288128.

The previous prime is 1021000021157. The next prime is 1021000021247. The reversal of 1021000021211 is 1121200001201.

It is a cyclic number.

It is not a de Polignac number, because 1021000021211 - 2¹⁸ = 1020999759067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021000021192 and 1021000021201.

It is not an unprimeable number, because it can be changed into a prime (1021000021291) 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, 449184971 + ... + 449187243.

It is an arithmetic number, because the mean of its divisors is an integer number (64500133950).

Almost surely, 2^{1021000021211} is an apocalyptic number.

1021000021211 is a deficient number, since it is larger than the sum of its proper divisors (11002121989).

1021000021211 is a wasteful number, since it uses less digits than its factorization.

1021000021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478.

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

Adding to 1021000021211 its reverse (1121200001201), we get a palindrome (2142200022412).

The spelling of 1021000021211 in words is "one trillion, twenty-one billion, twenty-one thousand, two hundred eleven".