200102001021 has 96 divisors (see below), whose sum is σ = 324575475840. Its totient is φ = 121777344000.

The previous prime is 200102001017. The next prime is 200102001037. The reversal of 200102001021 is 120100201002.

It is not a de Polignac number, because 200102001021 - 2² = 200102001017 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 200102000994 and 200102001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200102001721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 332948121 + ... + 332948721.

It is an arithmetic number, because the mean of its divisors is an integer number (3380994540).

Almost surely, 2^200102001021 is an apocalyptic number.

It is an amenable number.

200102001021 is a deficient number, since it is larger than the sum of its proper divisors (124473474819).

200102001021 is a wasteful number, since it uses less digits than its factorization.

200102001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1305 counting only the distinct ones).

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

Adding to 200102001021 its reverse (120100201002), we get a palindrome (320202202023).

The spelling of 200102001021 in words is "two hundred billion, one hundred two million, one thousand, twenty-one".