1220002101000 has 128 divisors (see below), whose sum is σ = 4229340710400. Its totient is φ = 325333886400.

The previous prime is 1220002100971. The next prime is 1220002101029. The reversal of 1220002101000 is 1012000221.

It is an interprime number because it is at equal distance from previous prime (1220002100971) and next prime (1220002101029).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22565632 + ... + 22619631.

It is an arithmetic number, because the mean of its divisors is an integer number (33041724300).

Almost surely, 2^{1220002101000} is an apocalyptic number.

1220002101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220002101000 is an abundant number, since it is smaller than the sum of its proper divisors (3009338609400).

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

1220002101000 is a wasteful number, since it uses less digits than its factorization.

1220002101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45185293 (or 45185273 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1220002101000 its reverse (1012000221), we get a palindrome (1221014101221).

The spelling of 1220002101000 in words is "one trillion, two hundred twenty billion, two million, one hundred one thousand".