222121001001020 has 48 divisors (see below), whose sum is σ = 508918201344000. Its totient is φ = 80761879302720.

The previous prime is 222121001000959. The next prime is 222121001001047. The reversal of 222121001001020 is 20100100121222.

It is a junction number, because it is equal to n+sod(n) for n = 222121001000986 and 222121001001004.

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, 56815100 + ... + 60598659.

It is an arithmetic number, because the mean of its divisors is an integer number (10602462528000).

Almost surely, 2^{222121001001020} is an apocalyptic number.

222121001001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121001001020 is an abundant number, since it is smaller than the sum of its proper divisors (286797200342980).

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

222121001001020 is a wasteful number, since it uses less digits than its factorization.

222121001001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117422378 (or 117422376 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 222121001001020 its reverse (20100100121222), we get a palindrome (242221101122242).

The spelling of 222121001001020 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one million, one thousand, twenty".