102100212121009 has 4 divisors (see below), whose sum is σ = 102100246101504. Its totient is φ = 102100178140516.

The previous prime is 102100212120919. The next prime is 102100212121021. The reversal of 102100212121009 is 900121212001201.

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 102100212121009 - 2¹⁵ = 102100212088241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100212721009) 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, 11993377 + ... + 18655870.

It is an arithmetic number, because the mean of its divisors is an integer number (25525061525376).

Almost surely, 2^{102100212121009} is an apocalyptic number.

It is an amenable number.

102100212121009 is a deficient number, since it is larger than the sum of its proper divisors (33980495).

102100212121009 is an equidigital number, since it uses as much as digits as its factorization.

102100212121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33980494.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 102100212121009 in words is "one hundred two trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, nine".