11211210101021 has 16 divisors (see below), whose sum is σ = 13055338816128. Its totient is φ = 9427734763200.

The previous prime is 11211210101017. The next prime is 11211210101093. The reversal of 11211210101021 is 12010101211211.

It is a cyclic number.

It is not a de Polignac number, because 11211210101021 - 2² = 11211210101017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211210100987 and 11211210101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211210101321) 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, 5410166 + ... + 7189736.

It is an arithmetic number, because the mean of its divisors is an integer number (815958676008).

Almost surely, 2^{11211210101021} is an apocalyptic number.

It is an amenable number.

11211210101021 is a deficient number, since it is larger than the sum of its proper divisors (1844128715107).

11211210101021 is a wasteful number, since it uses less digits than its factorization.

11211210101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796612.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11211210101021 its reverse (12010101211211), we get a palindrome (23221311312232).

The spelling of 11211210101021 in words is "eleven trillion, two hundred eleven billion, two hundred ten million, one hundred one thousand, twenty-one".