102102120210021 has 32 divisors (see below), whose sum is σ = 145942124959488. Its totient is φ = 63328206205440.

The previous prime is 102102120209989. The next prime is 102102120210037. The reversal of 102102120210021 is 120012021201201.

It is not a de Polignac number, because 102102120210021 - 2⁵ = 102102120209989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102120210091) 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 31 ways as a sum of consecutive naturals, for example, 1282065 + ... + 14347401.

It is an arithmetic number, because the mean of its divisors is an integer number (4560691404984).

Almost surely, 2^{102102120210021} is an apocalyptic number.

It is an amenable number.

102102120210021 is a deficient number, since it is larger than the sum of its proper divisors (43840004749467).

102102120210021 is a wasteful number, since it uses less digits than its factorization.

102102120210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13068461.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102102120210021 its reverse (120012021201201), we get a palindrome (222114141411222).

The spelling of 102102120210021 in words is "one hundred two trillion, one hundred two billion, one hundred twenty million, two hundred ten thousand, twenty-one".