222121200000020 has 24 divisors (see below), whose sum is σ = 466455013126368. Its totient is φ = 88848386071200.

The previous prime is 222121200000013. The next prime is 222121200000041. The reversal of 222121200000020 is 20000002121222.

It is a junction number, because it is equal to n+sod(n) for n = 222121199999950 and 222121200000004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15400475 + ... + 26103965.

It is an arithmetic number, because the mean of its divisors is an integer number (19435625546932).

Almost surely, 2^{222121200000020} is an apocalyptic number.

222121200000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121200000020 is an abundant number, since it is smaller than the sum of its proper divisors (244333813126348).

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

222121200000020 is a wasteful number, since it uses less digits than its factorization.

222121200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11741111 (or 11741109 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222121200000020 its reverse (20000002121222), we get a palindrome (242121202121242).

The spelling of 222121200000020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred million, twenty", and thus it is an aban number.