102100010102021 has 4 divisors (see below), whose sum is σ = 102100608920544. Its totient is φ = 102099411283500.

The previous prime is 102100010101939. The next prime is 102100010102081. The reversal of 102100010102021 is 120201010001201.

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 102100010102021 - 2²² = 102100005907717 is a prime.

It is a super-3 number, since 3×102100010102021³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100010101993 and 102100010102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100010102081) 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, 299153435 + ... + 299494536.

It is an arithmetic number, because the mean of its divisors is an integer number (25525152230136).

Almost surely, 2^{102100010102021} is an apocalyptic number.

It is an amenable number.

102100010102021 is a deficient number, since it is larger than the sum of its proper divisors (598818523).

102100010102021 is an equidigital number, since it uses as much as digits as its factorization.

102100010102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598818522.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102100010102021 its reverse (120201010001201), we get a palindrome (222301020103222).

The spelling of 102100010102021 in words is "one hundred two trillion, one hundred billion, ten million, one hundred two thousand, twenty-one".