102220110110021 has 4 divisors (see below), whose sum is σ = 103451677701792. Its totient is φ = 100988542518252.

The previous prime is 102220110110009. The next prime is 102220110110029. The reversal of 102220110110021 is 120011011022201.

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 cyclic number.

It is not a de Polignac number, because 102220110110021 - 2²⁶ = 102220043001157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102220110109978 and 102220110110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220110110029) 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, 615783795761 + ... + 615783795926.

It is an arithmetic number, because the mean of its divisors is an integer number (25862919425448).

Almost surely, 2^{102220110110021} is an apocalyptic number.

It is an amenable number.

102220110110021 is a deficient number, since it is larger than the sum of its proper divisors (1231567591771).

102220110110021 is an equidigital number, since it uses as much as digits as its factorization.

102220110110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231567591770.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102220110110021 its reverse (120011011022201), we get a palindrome (222231121132222).

The spelling of 102220110110021 in words is "one hundred two trillion, two hundred twenty billion, one hundred ten million, one hundred ten thousand, twenty-one".