102002100022021 has 4 divisors (see below), whose sum is σ = 105292490345344. Its totient is φ = 98711709698700.

The previous prime is 102002100021989. The next prime is 102002100022051. The reversal of 102002100022021 is 120220001200201.

It is a happy number.

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 102002100022021 - 2⁵ = 102002100021989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002100021992 and 102002100022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002100022051) 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, 1645195161615 + ... + 1645195161676.

It is an arithmetic number, because the mean of its divisors is an integer number (26323122586336).

Almost surely, 2^{102002100022021} is an apocalyptic number.

It is an amenable number.

102002100022021 is a deficient number, since it is larger than the sum of its proper divisors (3290390323323).

102002100022021 is an equidigital number, since it uses as much as digits as its factorization.

102002100022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290390323322.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102002100022021 its reverse (120220001200201), we get a palindrome (222222101222222).

The spelling of 102002100022021 in words is "one hundred two trillion, two billion, one hundred million, twenty-two thousand, twenty-one".