212221032123 has 32 divisors (see below), whose sum is σ = 291793895424. Its totient is φ = 137127053952.

The previous prime is 212221032119. The next prime is 212221032137. The reversal of 212221032123 is 321230122212.

It is not a de Polignac number, because 212221032123 - 2² = 212221032119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212221032123.

It is not an unprimeable number, because it can be changed into a prime (212221032113) 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, 9963561 + ... + 9984837.

It is an arithmetic number, because the mean of its divisors is an integer number (9118559232).

Almost surely, 2^212221032123 is an apocalyptic number.

212221032123 is a deficient number, since it is larger than the sum of its proper divisors (79572863301).

212221032123 is a wasteful number, since it uses less digits than its factorization.

212221032123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22011.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212221032123 its reverse (321230122212), we get a palindrome (533451154335).

The spelling of 212221032123 in words is "two hundred twelve billion, two hundred twenty-one million, thirty-two thousand, one hundred twenty-three".