201001020102 has 32 divisors (see below), whose sum is σ = 470177827200. Its totient is φ = 63474006024.

The previous prime is 201001020097. The next prime is 201001020113. The reversal of 201001020102 is 201020100102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97952688 + ... + 97954739.

It is an arithmetic number, because the mean of its divisors is an integer number (14693057100).

Almost surely, 2^201001020102 is an apocalyptic number.

201001020102 is an abundant number, since it is smaller than the sum of its proper divisors (269176807098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201001020102 is a wasteful number, since it uses less digits than its factorization.

201001020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195907457 (or 195907451 counting only the distinct ones).

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

Adding to 201001020102 its reverse (201020100102), we get a palindrome (402021120204).

The spelling of 201001020102 in words is "two hundred one billion, one million, twenty thousand, one hundred two".