21201020220000 has 120 divisors (see below), whose sum is σ = 69543586722456. Its totient is φ = 5653605376000.

The previous prime is 21201020219999. The next prime is 21201020220043. The reversal of 21201020220000 is 2202010212.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 176615169 + ... + 176735168.

Almost surely, 2^{21201020220000} is an apocalyptic number.

21201020220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201020220000 is an abundant number, since it is smaller than the sum of its proper divisors (48342566502456).

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

21201020220000 is an equidigital number, since it uses as much as digits as its factorization.

21201020220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353350370 (or 353350347 counting only the distinct ones).

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

Adding to 21201020220000 its reverse (2202010212), we get a palindrome (21203222230212).

The spelling of 21201020220000 in words is "twenty-one trillion, two hundred one billion, twenty million, two hundred twenty thousand".