102020201100021 has 32 divisors (see below), whose sum is σ = 139774728038400. Its totient is φ = 66141457390080.

The previous prime is 102020201099987. The next prime is 102020201100061. The reversal of 102020201100021 is 120001102020201.

It is not a de Polignac number, because 102020201100021 - 2¹¹ = 102020201097973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020201100061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2259010681 + ... + 2259055841.

It is an arithmetic number, because the mean of its divisors is an integer number (4367960251200).

Almost surely, 2^{102020201100021} is an apocalyptic number.

It is an amenable number.

102020201100021 is a deficient number, since it is larger than the sum of its proper divisors (37754526938379).

102020201100021 is a wasteful number, since it uses less digits than its factorization.

102020201100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55149.

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

Adding to 102020201100021 its reverse (120001102020201), we get a palindrome (222021303120222).

The spelling of 102020201100021 in words is "one hundred two trillion, twenty billion, two hundred one million, one hundred thousand, twenty-one".