222121202020 has 48 divisors (see below), whose sum is σ = 519887410560. Its totient is φ = 79220934144.

The previous prime is 222121202011. The next prime is 222121202053. The reversal of 222121202020 is 20202121222.

It is a junction number, because it is equal to n+sod(n) for n = 222121201985 and 222121202003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17185584 + ... + 17198503.

It is an arithmetic number, because the mean of its divisors is an integer number (10830987720).

Almost surely, 2^222121202020 is an apocalyptic number.

222121202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121202020 is an abundant number, since it is smaller than the sum of its proper divisors (297766208540).

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

222121202020 is a wasteful number, since it uses less digits than its factorization.

222121202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34384132 (or 34384130 counting only the distinct ones).

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

Adding to 222121202020 its reverse (20202121222), we get a palindrome (242323323242).

The spelling of 222121202020 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred two thousand, twenty".