102112211100021 has 8 divisors (see below), whose sum is σ = 136200741215040. Its totient is φ = 68049244192512.

The previous prime is 102112211100001. The next prime is 102112211100061. The reversal of 102112211100021 is 120001112211201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102112211100021 - 2⁷ = 102112211099893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112211100001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6390792556 + ... + 6390808533.

It is an arithmetic number, because the mean of its divisors is an integer number (17025092651880).

Almost surely, 2^{102112211100021} is an apocalyptic number.

It is an amenable number.

102112211100021 is a deficient number, since it is larger than the sum of its proper divisors (34088530115019).

102112211100021 is a wasteful number, since it uses less digits than its factorization.

102112211100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781603755.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102112211100021 its reverse (120001112211201), we get a palindrome (222113323311222).

The spelling of 102112211100021 in words is "one hundred two trillion, one hundred twelve billion, two hundred eleven million, one hundred thousand, twenty-one".