211222110021 has 32 divisors (see below), whose sum is σ = 327042871680. Its totient is φ = 120138163200.

The previous prime is 211222109963. The next prime is 211222110031. The reversal of 211222110021 is 120011222112.

It is not a de Polignac number, because 211222110021 - 2⁹ = 211222109509 is a prime.

It is a super-2 number, since 2×211222110021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222110031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3445840 + ... + 3506601.

It is an arithmetic number, because the mean of its divisors is an integer number (10220089740).

Almost surely, 2^211222110021 is an apocalyptic number.

It is an amenable number.

211222110021 is a deficient number, since it is larger than the sum of its proper divisors (115820761659).

211222110021 is a wasteful number, since it uses less digits than its factorization.

211222110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952517.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211222110021 its reverse (120011222112), we get a palindrome (331233332133).

The spelling of 211222110021 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".