210102420456 has 32 divisors (see below), whose sum is σ = 583617835200. Its totient is φ = 70034140080.

The previous prime is 210102420427. The next prime is 210102420457. The reversal of 210102420456 is 654024201012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (210102420457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486347980 + ... + 486348411.

It is an arithmetic number, because the mean of its divisors is an integer number (18238057350).

Almost surely, 2^210102420456 is an apocalyptic number.

It is an amenable number.

210102420456 is an abundant number, since it is smaller than the sum of its proper divisors (373515414744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210102420456 is a wasteful number, since it uses less digits than its factorization.

210102420456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972696406 (or 972696396 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 210102420456 its reverse (654024201012), we get a palindrome (864126621468).

The spelling of 210102420456 in words is "two hundred ten billion, one hundred two million, four hundred twenty thousand, four hundred fifty-six".