212430130021 has 16 divisors (see below), whose sum is σ = 225309011200. Its totient is φ = 199724211648.

The previous prime is 212430129979. The next prime is 212430130091. The reversal of 212430130021 is 120031034212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212430130021 - 2³⁷ = 74991176549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212430130091) 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, 2429956 + ... + 2515858.

It is an arithmetic number, because the mean of its divisors is an integer number (14081813200).

Almost surely, 2^212430130021 is an apocalyptic number.

It is an amenable number.

212430130021 is a deficient number, since it is larger than the sum of its proper divisors (12878881179).

212430130021 is a wasteful number, since it uses less digits than its factorization.

212430130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86908.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212430130021 its reverse (120031034212), we get a palindrome (332461164233).

The spelling of 212430130021 in words is "two hundred twelve billion, four hundred thirty million, one hundred thirty thousand, twenty-one".