21022200001200 has 120 divisors (see below), whose sum is σ = 69161144258128. Its totient is φ = 5454408637440.

The previous prime is 21022200001189. The next prime is 21022200001249. The reversal of 21022200001200 is 210000222012.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 236692087 + ... + 236780886.

Almost surely, 2^{21022200001200} is an apocalyptic number.

21022200001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022200001200 is an abundant number, since it is smaller than the sum of its proper divisors (48138944256928).

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

21022200001200 is a wasteful number, since it uses less digits than its factorization.

21022200001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473473031 (or 473473020 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21022200001200 its reverse (210000222012), we get a palindrome (21232200223212).

The spelling of 21022200001200 in words is "twenty-one trillion, twenty-two billion, two hundred million, one thousand, two hundred".