1002221222220 has 144 divisors (see below), whose sum is σ = 3286563702240. Its totient is φ = 246349651968.

The previous prime is 1002221222117. The next prime is 1002221222269. The reversal of 1002221222220 is 222221222001.

1002221222220 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 221 + 222 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1002221222193 and 1002221222202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3833557 + ... + 4086636.

Almost surely, 2^{1002221222220} is an apocalyptic number.

1002221222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002221222220 is an abundant number, since it is smaller than the sum of its proper divisors (2284342480020).

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

1002221222220 is a wasteful number, since it uses less digits than its factorization.

1002221222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920264 (or 7920259 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1002221222220 its reverse (222221222001), we get a palindrome (1224442444221).

The spelling of 1002221222220 in words is "one trillion, two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".