100021020201 has 12 divisors (see below), whose sum is σ = 144507977328. Its totient is φ = 66665370744.

The previous prime is 100021020167. The next prime is 100021020217. The reversal of 100021020201 is 102020120001.

It is not a de Polignac number, because 100021020201 - 2¹³ = 100021012009 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100021020901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1234335 + ... + 1312868.

It is an arithmetic number, because the mean of its divisors is an integer number (12042331444).

Almost surely, 2^100021020201 is an apocalyptic number.

It is an amenable number.

100021020201 is a deficient number, since it is larger than the sum of its proper divisors (44486957127).

100021020201 is a wasteful number, since it uses less digits than its factorization.

100021020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551572 (or 2551569 counting only the distinct ones).

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

Adding to 100021020201 its reverse (102020120001), we get a palindrome (202041140202).

The spelling of 100021020201 in words is "one hundred billion, twenty-one million, twenty thousand, two hundred one".