102100231313021 has 4 divisors (see below), whose sum is σ = 102100251581952. Its totient is φ = 102100211044092.

The previous prime is 102100231313011. The next prime is 102100231313131. The reversal of 102100231313021 is 120313132001201.

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 102100231313021 - 2⁴⁶ = 31731487135357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100231312984 and 102100231313002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100231313011) 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, 3898436 + ... + 14812098.

It is an arithmetic number, because the mean of its divisors is an integer number (25525062895488).

Almost surely, 2^{102100231313021} is an apocalyptic number.

It is an amenable number.

102100231313021 is a deficient number, since it is larger than the sum of its proper divisors (20268931).

102100231313021 is an equidigital number, since it uses as much as digits as its factorization.

102100231313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20268930.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 102100231313021 its reverse (120313132001201), we get a palindrome (222413363314222).

The spelling of 102100231313021 in words is "one hundred two trillion, one hundred billion, two hundred thirty-one million, three hundred thirteen thousand, twenty-one".