222121011202020 has 72 divisors (see below), whose sum is σ = 770019505504704. Its totient is φ = 50770516845888.

The previous prime is 222121011201983. The next prime is 222121011202039. The reversal of 222121011202020 is 20202110121222.

It is a happy number.

222121011202020 is a `hidden beast` number, since 2 + 221 + 210 + 11 + 20 + 202 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 222121011201984 and 222121011202002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88143257154 + ... + 88143259673.

It is an arithmetic number, because the mean of its divisors is an integer number (10694715354232).

Almost surely, 2^{222121011202020} is an apocalyptic number.

222121011202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121011202020 is an abundant number, since it is smaller than the sum of its proper divisors (547898494302684).

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

222121011202020 is a wasteful number, since it uses less digits than its factorization.

222121011202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176286516849 (or 176286516844 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222121011202020 its reverse (20202110121222), we get a palindrome (242323121323242).

The spelling of 222121011202020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, eleven million, two hundred two thousand, twenty".