201220021202100 has 72 divisors (see below), whose sum is σ = 582198271821600. Its totient is φ = 53658517745280.

The previous prime is 201220021202087. The next prime is 201220021202107. The reversal of 201220021202100 is 1202120022102.

201220021202100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201220021202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220021202107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135353626 + ... + 136832174.

Almost surely, 2^{201220021202100} is an apocalyptic number.

201220021202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220021202100 is an abundant number, since it is smaller than the sum of its proper divisors (380978250619500).

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

201220021202100 is a wasteful number, since it uses less digits than its factorization.

201220021202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932209 (or 1932202 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201220021202100 its reverse (1202120022102), we get a palindrome (202422141224202).

The spelling of 201220021202100 in words is "two hundred one trillion, two hundred twenty billion, twenty-one million, two hundred two thousand, one hundred".