202001221000 has 64 divisors (see below), whose sum is σ = 472753110960. Its totient is φ = 80788480000.

The previous prime is 202001220997. The next prime is 202001221001. The reversal of 202001221000 is 122100202.

It can be written as a sum of positive squares in 8 ways, for example, as 2830027204 + 199171193796 = 53198^2 + 446286^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (202001221001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10171080 + ... + 10190920.

Almost surely, 2^202001221000 is an apocalyptic number.

202001221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202001221000 is an abundant number, since it is smaller than the sum of its proper divisors (270751889960).

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

202001221000 is a wasteful number, since it uses less digits than its factorization.

202001221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30043 (or 30029 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202001221000 its reverse (122100202), we get a palindrome (202123321202).

The spelling of 202001221000 in words is "two hundred two billion, one million, two hundred twenty-one thousand".