210020102121999 has 32 divisors (see below), whose sum is σ = 314965804575744. Its totient is φ = 123511179559680.

The previous prime is 210020102121979. The next prime is 210020102122021. The reversal of 210020102121999 is 999121201020012.

It is a happy number.

210020102121999 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 210020102121999 - 2¹¹ = 210020102119951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020102121919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105732547 + ... + 107700564.

It is an arithmetic number, because the mean of its divisors is an integer number (9842681392992).

Almost surely, 2^{210020102121999} is an apocalyptic number.

210020102121999 is a deficient number, since it is larger than the sum of its proper divisors (104945702453745).

210020102121999 is a wasteful number, since it uses less digits than its factorization.

210020102121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213434247.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 210020102121999 in words is "two hundred ten trillion, twenty billion, one hundred two million, one hundred twenty-one thousand, nine hundred ninety-nine".