21001030113210 has 48 divisors (see below), whose sum is σ = 58631447340576. Its totient is φ = 4800235454112.

The previous prime is 21001030113209. The next prime is 21001030113211. The reversal of 21001030113210 is 1231103010012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21001030113209) and next prime (21001030113211).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21001030113210.

It is not an unprimeable number, because it can be changed into a prime (21001030113211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7143206052 + ... + 7143208991.

It is an arithmetic number, because the mean of its divisors is an integer number (1221488486262).

Almost surely, 2^{21001030113210} is an apocalyptic number.

21001030113210 is an abundant number, since it is smaller than the sum of its proper divisors (37630417227366).

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

21001030113210 is a wasteful number, since it uses less digits than its factorization.

21001030113210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286415067 (or 14286415060 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21001030113210 its reverse (1231103010012), we get a palindrome (22232133123222).

The spelling of 21001030113210 in words is "twenty-one trillion, one billion, thirty million, one hundred thirteen thousand, two hundred ten".