2211211100021 has 24 divisors (see below), whose sum is σ = 2777833582272. Its totient is φ = 1722951014400.

The previous prime is 2211211100017. The next prime is 2211211100029. The reversal of 2211211100021 is 1200011121122.

It is not a de Polignac number, because 2211211100021 - 2² = 2211211100017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211211099969 and 2211211100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211211100029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31840466 + ... + 31909836.

It is an arithmetic number, because the mean of its divisors is an integer number (115743065928).

Almost surely, 2^{2211211100021} is an apocalyptic number.

It is an amenable number.

2211211100021 is a deficient number, since it is larger than the sum of its proper divisors (566622482251).

2211211100021 is a wasteful number, since it uses less digits than its factorization.

2211211100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107033 (or 107022 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2211211100021 its reverse (1200011121122), we get a palindrome (3411222221143).

The spelling of 2211211100021 in words is "two trillion, two hundred eleven billion, two hundred eleven million, one hundred thousand, twenty-one".