1022117555620 has 48 divisors (see below), whose sum is σ = 2453635997568. Its totient is φ = 350361181440.

The previous prime is 1022117555609. The next prime is 1022117555621. The reversal of 1022117555620 is 265557112201.

It is a self number, because there is not a number n which added to its sum of digits gives 1022117555620.

It is not an unprimeable number, because it can be changed into a prime (1022117555621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200242 + ... + 1443721.

It is an arithmetic number, because the mean of its divisors is an integer number (51117416616).

Almost surely, 2^{1022117555620} is an apocalyptic number.

1022117555620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022117555620 is an abundant number, since it is smaller than the sum of its proper divisors (1431518441948).

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

1022117555620 is a wasteful number, since it uses less digits than its factorization.

1022117555620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648420 (or 1648418 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 1022117555620 in words is "one trillion, twenty-two billion, one hundred seventeen million, five hundred fifty-five thousand, six hundred twenty".