21002022001200 has 60 divisors (see below), whose sum is σ = 67276477147688. Its totient is φ = 5600539200000.

The previous prime is 21002022001123. The next prime is 21002022001267. The reversal of 21002022001200 is 210022020012.

It is a tau number, because it is divible by the number of its divisors (60).

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 11 ways as a sum of consecutive naturals, for example, 8750841301 + ... + 8750843700.

Almost surely, 2^{21002022001200} is an apocalyptic number.

21002022001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002022001200 is an abundant number, since it is smaller than the sum of its proper divisors (46274455146488).

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

21002022001200 is a wasteful number, since it uses less digits than its factorization.

21002022001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17501685022 (or 17501685011 counting only the distinct ones).

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

Adding to 21002022001200 its reverse (210022020012), we get a palindrome (21212044021212).

The spelling of 21002022001200 in words is "twenty-one trillion, two billion, twenty-two million, one thousand, two hundred".