21142200220 has 48 divisors (see below), whose sum is σ = 47875312800. Its totient is φ = 7816366080.

The previous prime is 21142200217. The next prime is 21142200253. The reversal of 21142200220 is 2200224112.

It is a junction number, because it is equal to n+sod(n) for n = 21142200194 and 21142200203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662925 + ... + 694084.

It is an arithmetic number, because the mean of its divisors is an integer number (997402350).

Almost surely, 2^21142200220 is an apocalyptic number.

21142200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142200220 is an abundant number, since it is smaller than the sum of its proper divisors (26733112580).

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

21142200220 is a wasteful number, since it uses less digits than its factorization.

21142200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357078 (or 1357076 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21142200220 its reverse (2200224112), we get a palindrome (23342424332).

The spelling of 21142200220 in words is "twenty-one billion, one hundred forty-two million, two hundred thousand, two hundred twenty".