1000121022220 has 48 divisors (see below), whose sum is σ = 2126922336000. Its totient is φ = 394999450560.

The previous prime is 1000121022209. The next prime is 1000121022281. The reversal of 1000121022220 is 222201210001.

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 1000121022220.

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, 437730 + ... + 1480489.

It is an arithmetic number, because the mean of its divisors is an integer number (44310882000).

Almost surely, 2^{1000121022220} is an apocalyptic number.

1000121022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000121022220 is an abundant number, since it is smaller than the sum of its proper divisors (1126801313780).

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

1000121022220 is a wasteful number, since it uses less digits than its factorization.

1000121022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918558 (or 1918556 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1000121022220 its reverse (222201210001), we get a palindrome (1222322232221).

The spelling of 1000121022220 in words is "one trillion, one hundred twenty-one million, twenty-two thousand, two hundred twenty".