212122200222021 has 16 divisors (see below), whose sum is σ = 293293776024704. Its totient is φ = 136256926296384.

The previous prime is 212122200222019. The next prime is 212122200222043. The reversal of 212122200222021 is 120222002221212.

It is not a de Polignac number, because 212122200222021 - 2¹ = 212122200222019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122200222001) 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, 9276740086 + ... + 9276762951.

It is an arithmetic number, because the mean of its divisors is an integer number (18330861001544).

Almost surely, 2^{212122200222021} is an apocalyptic number.

It is an amenable number.

212122200222021 is a deficient number, since it is larger than the sum of its proper divisors (81171575802683).

212122200222021 is a wasteful number, since it uses less digits than its factorization.

212122200222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18553503180.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212122200222021 its reverse (120222002221212), we get a palindrome (332344202443233).

The spelling of 212122200222021 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred million, two hundred twenty-two thousand, twenty-one".