212100022122021 has 48 divisors (see below), whose sum is σ = 336096342271872. Its totient is φ = 127823245603200.

The previous prime is 212100022122017. The next prime is 212100022122071. The reversal of 212100022122021 is 120221220001212.

It is a happy number.

212100022122021 is a `hidden beast` number, since 212 + 10 + 0 + 0 + 221 + 220 + 2 + 1 = 666.

212100022122021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212100022122021 - 2² = 212100022122017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212100022121985 and 212100022122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100022122071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191773216 + ... + 192876038.

It is an arithmetic number, because the mean of its divisors is an integer number (7002007130664).

Almost surely, 2^{212100022122021} is an apocalyptic number.

It is an amenable number.

212100022122021 is a deficient number, since it is larger than the sum of its proper divisors (123996320149851).

212100022122021 is a wasteful number, since it uses less digits than its factorization.

212100022122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113754 (or 1113751 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212100022122021 its reverse (120221220001212), we get a palindrome (332321242123233).

The spelling of 212100022122021 in words is "two hundred twelve trillion, one hundred billion, twenty-two million, one hundred twenty-two thousand, twenty-one".