102100020221021 has 16 divisors (see below), whose sum is σ = 111834788788800. Its totient is φ = 92779637115648.

The previous prime is 102100020221009. The next prime is 102100020221033. The reversal of 102100020221021 is 120122020001201.

It is an interprime number because it is at equal distance from previous prime (102100020221009) and next prime (102100020221033).

It is a cyclic number.

It is not a de Polignac number, because 102100020221021 - 2⁴² = 97701973709917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102100020220987 and 102100020221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100020223021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52206410 + ... + 54126788.

It is an arithmetic number, because the mean of its divisors is an integer number (6989674299300).

Almost surely, 2^{102100020221021} is an apocalyptic number.

It is an amenable number.

102100020221021 is a deficient number, since it is larger than the sum of its proper divisors (9734768567779).

102100020221021 is a wasteful number, since it uses less digits than its factorization.

102100020221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028268.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102100020221021 its reverse (120122020001201), we get a palindrome (222222040222222).

The spelling of 102100020221021 in words is "one hundred two trillion, one hundred billion, twenty million, two hundred twenty-one thousand, twenty-one".