212222210101 has 24 divisors (see below), whose sum is σ = 235626947424. Its totient is φ = 189543900000.

The previous prime is 212222210041. The next prime is 212222210111. The reversal of 212222210101 is 101012222212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212222210101 is a prime.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222210111) 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, 19060306 + ... + 19071436.

It is an arithmetic number, because the mean of its divisors is an integer number (9817789476).

Almost surely, 2^212222210101 is an apocalyptic number.

It is an amenable number.

212222210101 is a deficient number, since it is larger than the sum of its proper divisors (23404737323).

212222210101 is a wasteful number, since it uses less digits than its factorization.

212222210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11505 (or 11374 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212222210101 its reverse (101012222212), we get a palindrome (313234432313).

The spelling of 212222210101 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred ten thousand, one hundred one".