1002121201 has 6 divisors (see below), whose sum is σ = 1047586610. Its totient is φ = 958550208.

The previous prime is 1002121181. The next prime is 1002121217. The reversal of 1002121201 is 1021212001.

It can be written as a sum of positive squares in only one way, i.e., 746600976 + 255520225 = 27324^2 + 15985^2 .

It is not a de Polignac number, because 1002121201 - 2²⁷ = 867903473 is a prime.

It is a super-3 number, since 3×1002121201³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002121291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 946656 + ... + 947713.

Almost surely, 2^1002121201 is an apocalyptic number.

It is an amenable number.

1002121201 is a deficient number, since it is larger than the sum of its proper divisors (45465409).

1002121201 is an equidigital number, since it uses as much as digits as its factorization.

1002121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894415 (or 1894392 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1002121201 is about 31656.2979673872. The cubic root of 1002121201 is about 1000.7065676446.

Adding to 1002121201 its reverse (1021212001), we get a palindrome (2023333202).

The spelling of 1002121201 in words is "one billion, two million, one hundred twenty-one thousand, two hundred one".