1002221122220 has 48 divisors (see below), whose sum is σ = 2300354235648. Its totient is φ = 365135585280.

The previous prime is 1002221122213. The next prime is 1002221122241. The reversal of 1002221122220 is 222211222001.

It is a happy number.

It is a super-3 number, since 3×1002221122220³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 47533157 + ... + 47554236.

It is an arithmetic number, because the mean of its divisors is an integer number (47924046576).

Almost surely, 2^{1002221122220} is an apocalyptic number.

1002221122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002221122220 is an abundant number, since it is smaller than the sum of its proper divisors (1298133113428).

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

1002221122220 is a wasteful number, since it uses less digits than its factorization.

1002221122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95087450 (or 95087448 counting only the distinct ones).

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

Adding to 1002221122220 its reverse (222211222001), we get a palindrome (1224432344221).

The spelling of 1002221122220 in words is "one trillion, two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".