212210122421 has 16 divisors (see below), whose sum is σ = 234109623168. Its totient is φ = 190750392000.

The previous prime is 212210122387. The next prime is 212210122433. The reversal of 212210122421 is 124221012212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212210122421 - 2¹⁴ = 212210106037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212210122393 and 212210122402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210122921) 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, 696935 + ... + 954011.

It is an arithmetic number, because the mean of its divisors is an integer number (14631851448).

Almost surely, 2^212210122421 is an apocalyptic number.

It is an amenable number.

212210122421 is a deficient number, since it is larger than the sum of its proper divisors (21899500747).

212210122421 is a wasteful number, since it uses less digits than its factorization.

212210122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257932.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212210122421 its reverse (124221012212), we get a palindrome (336431134633).

The spelling of 212210122421 in words is "two hundred twelve billion, two hundred ten million, one hundred twenty-two thousand, four hundred twenty-one".