202101001002 has 48 divisors (see below), whose sum is σ = 446223028680. Its totient is φ = 66084734976.

The previous prime is 202101000979. The next prime is 202101001007. The reversal of 202101001002 is 200100101202.

It can be written as a sum of positive squares in 4 ways, for example, as 183585683961 + 18515317041 = 428469^2 + 136071^2 .

It is a super-3 number, since 3×202101001002³ (a number of 35 digits) contains 333 as substring.

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 (202101001007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7099774 + ... + 7128182.

Almost surely, 2^202101001002 is an apocalyptic number.

202101001002 is an abundant number, since it is smaller than the sum of its proper divisors (244122027678).

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

202101001002 is a wasteful number, since it uses less digits than its factorization.

202101001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35927 (or 35924 counting only the distinct ones).

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

Adding to 202101001002 its reverse (200100101202), we get a palindrome (402201102204).

The spelling of 202101001002 in words is "two hundred two billion, one hundred one million, one thousand, two".