102021120100021 has 8 divisors (see below), whose sum is σ = 105000295145760. Its totient is φ = 99083611838352.

The previous prime is 102021120100019. The next prime is 102021120100051. The reversal of 102021120100021 is 120001021120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102021120100021 - 2¹ = 102021120100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021120099974 and 102021120100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021120100051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10416691050 + ... + 10416700843.

It is an arithmetic number, because the mean of its divisors is an integer number (13125036893220).

Almost surely, 2^{102021120100021} is an apocalyptic number.

It is an amenable number.

102021120100021 is a deficient number, since it is larger than the sum of its proper divisors (2979175045739).

102021120100021 is an equidigital number, since it uses as much as digits as its factorization.

102021120100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20833392035.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102021120100021 its reverse (120001021120201), we get a palindrome (222022141220222).

The spelling of 102021120100021 in words is "one hundred two trillion, twenty-one billion, one hundred twenty million, one hundred thousand, twenty-one".