1220022222000 has 80 divisors (see below), whose sum is σ = 3933351663072. Its totient is φ = 325339257600.

The previous prime is 1220022221981. The next prime is 1220022222007. The reversal of 1220022222000 is 2222200221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1220022222007) 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, 101662519 + ... + 101674518.

Almost surely, 2^{1220022222000} is an apocalyptic number.

1220022222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220022222000 is an abundant number, since it is smaller than the sum of its proper divisors (2713329441072).

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

1220022222000 is a wasteful number, since it uses less digits than its factorization.

1220022222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203337063 (or 203337047 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 1220022222000 its reverse (2222200221), we get a palindrome (1222244422221).

The spelling of 1220022222000 in words is "one trillion, two hundred twenty billion, twenty-two million, two hundred twenty-two thousand".