102021210221021 has 16 divisors (see below), whose sum is σ = 125570563165824. Its totient is φ = 80716223369664.

The previous prime is 102021210220999. The next prime is 102021210221057. The reversal of 102021210221021 is 120122012120201.

It is a cyclic number.

It is not a de Polignac number, because 102021210221021 - 2²² = 102021206026717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021210221621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24854510 + ... + 28666863.

It is an arithmetic number, because the mean of its divisors is an integer number (7848160197864).

Almost surely, 2^{102021210221021} is an apocalyptic number.

It is an amenable number.

102021210221021 is a deficient number, since it is larger than the sum of its proper divisors (23549352944803).

102021210221021 is a wasteful number, since it uses less digits than its factorization.

102021210221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53542340.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102021210221021 its reverse (120122012120201), we get a palindrome (222143222341222).

The spelling of 102021210221021 in words is "one hundred two trillion, twenty-one billion, two hundred ten million, two hundred twenty-one thousand, twenty-one".