102102201021 has 4 divisors (see below), whose sum is σ = 136136268032. Its totient is φ = 68068134012.

The previous prime is 102102201017. The next prime is 102102201029. The reversal of 102102201021 is 120102201201.

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 not a de Polignac number, because 102102201021 - 2² = 102102201017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102102200988 and 102102201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17017033501 + ... + 17017033506.

It is an arithmetic number, because the mean of its divisors is an integer number (34034067008).

Almost surely, 2^102102201021 is an apocalyptic number.

It is an amenable number.

102102201021 is a deficient number, since it is larger than the sum of its proper divisors (34034067011).

102102201021 is an equidigital number, since it uses as much as digits as its factorization.

102102201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34034067010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102102201021 its reverse (120102201201), we get a palindrome (222204402222).

The spelling of 102102201021 in words is "one hundred two billion, one hundred two million, two hundred one thousand, twenty-one".