210021792101 has 4 divisors (see below), whose sum is σ = 229114682304. Its totient is φ = 190928901900.

The previous prime is 210021792077. The next prime is 210021792103. The reversal of 210021792101 is 101297120012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-210021792101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021792103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546445085 + ... + 9546445106.

It is an arithmetic number, because the mean of its divisors is an integer number (57278670576).

Almost surely, 2^210021792101 is an apocalyptic number.

It is an amenable number.

210021792101 is a deficient number, since it is larger than the sum of its proper divisors (19092890203).

210021792101 is a wasteful number, since it uses less digits than its factorization.

210021792101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092890202.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 210021792101 in words is "two hundred ten billion, twenty-one million, seven hundred ninety-two thousand, one hundred one".