201021220000 has 60 divisors (see below), whose sum is σ = 494542403586. Its totient is φ = 80408480000.

The previous prime is 201021219983. The next prime is 201021220007. The reversal of 201021220000 is 22120102.

It can be written as a sum of positive squares in 5 ways, for example, as 6691894416 + 194329325584 = 81804^2 + 440828^2 .

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 (201021220007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5005531 + ... + 5045530.

Almost surely, 2^201021220000 is an apocalyptic number.

201021220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021220000 is an abundant number, since it is smaller than the sum of its proper divisors (293521183586).

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

201021220000 is an equidigital number, since it uses as much as digits as its factorization.

201021220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051091 (or 10051068 counting only the distinct ones).

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

Adding to 201021220000 its reverse (22120102), we get a palindrome (201043340102).

The spelling of 201021220000 in words is "two hundred one billion, twenty-one million, two hundred twenty thousand".