200121001002 has 48 divisors (see below), whose sum is σ = 484243425120. Its totient is φ = 61575690672.

The previous prime is 200121000973. The next prime is 200121001019. The reversal of 200121001002 is 200100121002.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15831052 + ... + 15843687.

It is an arithmetic number, because the mean of its divisors is an integer number (10088404690).

Almost surely, 2^200121001002 is an apocalyptic number.

200121001002 is an abundant number, since it is smaller than the sum of its proper divisors (284122424118).

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

200121001002 is a wasteful number, since it uses less digits than its factorization.

200121001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31674769 (or 31674757 counting only the distinct ones).

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

Adding to 200121001002 its reverse (200100121002), we get a palindrome (400221122004).

The spelling of 200121001002 in words is "two hundred billion, one hundred twenty-one million, one thousand, two".