102020210051 has 4 divisors (see below), whose sum is σ = 102021061872. Its totient is φ = 102019358232.

The previous prime is 102020209943. The next prime is 102020210053. The reversal of 102020210051 is 150012020201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102020210051 is a prime.

It is a super-2 number, since 2×102020210051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102020210053) 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, 209660 + ... + 497993.

It is an arithmetic number, because the mean of its divisors is an integer number (25505265468).

Almost surely, 2^102020210051 is an apocalyptic number.

102020210051 is a deficient number, since it is larger than the sum of its proper divisors (851821).

102020210051 is an equidigital number, since it uses as much as digits as its factorization.

102020210051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851820.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 102020210051 its reverse (150012020201), we get a palindrome (252032230252).

The spelling of 102020210051 in words is "one hundred two billion, twenty million, two hundred ten thousand, fifty-one".