21322200120 has 128 divisors (see below), whose sum is σ = 71262676800. Its totient is φ = 5067546624.

The previous prime is 21322200103. The next prime is 21322200127. The reversal of 21322200120 is 2100222312.

It is a happy number.

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 21322200120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322200127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190417 + ... + 280896.

Almost surely, 2^21322200120 is an apocalyptic number.

21322200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322200120 is an abundant number, since it is smaller than the sum of its proper divisors (49940476680).

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

21322200120 is a wasteful number, since it uses less digits than its factorization.

21322200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471369 (or 471365 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21322200120 its reverse (2100222312), we get a palindrome (23422422432).

The spelling of 21322200120 in words is "twenty-one billion, three hundred twenty-two million, two hundred thousand, one hundred twenty".