100102020022021 has 4 divisors (see below), whose sum is σ = 100102041909100. Its totient is φ = 100101998134944.

The previous prime is 100102020022007. The next prime is 100102020022057. The reversal of 100102020022021 is 120220020201001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5462101848996 + 94639918173025 = 2337114^2 + 9728305^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102020022021 - 2¹⁵ = 100102019989253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100102020021992 and 100102020022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102020023021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179006 + ... + 14198383.

It is an arithmetic number, because the mean of its divisors is an integer number (25025510477275).

Almost surely, 2^{100102020022021} is an apocalyptic number.

It is an amenable number.

100102020022021 is a deficient number, since it is larger than the sum of its proper divisors (21887079).

100102020022021 is an equidigital number, since it uses as much as digits as its factorization.

100102020022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21887078.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100102020022021 its reverse (120220020201001), we get a palindrome (220322040223022).

The spelling of 100102020022021 in words is "one hundred trillion, one hundred two billion, twenty million, twenty-two thousand, twenty-one".