102020020101 has 40 divisors (see below), whose sum is σ = 165117769344. Its totient is φ = 62523861120.

The previous prime is 102020020087. The next prime is 102020020103. The reversal of 102020020101 is 101020020201.

It is not a de Polignac number, because 102020020101 - 2¹⁴ = 102020003717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020020103) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 802285 + ... + 920706.

Almost surely, 2^102020020101 is an apocalyptic number.

It is an amenable number.

102020020101 is a deficient number, since it is larger than the sum of its proper divisors (63097749243).

102020020101 is a wasteful number, since it uses less digits than its factorization.

102020020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723063 (or 1723054 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102020020101 its reverse (101020020201), we get a palindrome (203040040302).

The spelling of 102020020101 in words is "one hundred two billion, twenty million, twenty thousand, one hundred one".