1220222121020 has 24 divisors (see below), whose sum is σ = 2928533090784. Its totient is φ = 418361870016.

The previous prime is 1220222120987. The next prime is 1220222121023. The reversal of 1220222121020 is 201212220221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220222121020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222121023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4357936007 + ... + 4357936286.

It is an arithmetic number, because the mean of its divisors is an integer number (122022212116).

Almost surely, 2^{1220222121020} is an apocalyptic number.

1220222121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220222121020 is an abundant number, since it is smaller than the sum of its proper divisors (1708310969764).

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

1220222121020 is a wasteful number, since it uses less digits than its factorization.

1220222121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715872309 (or 8715872307 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220222121020 its reverse (201212220221), we get a palindrome (1421434341241).

The spelling of 1220222121020 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty".