1220111221002 has 64 divisors (see below), whose sum is σ = 2556591133824. Its totient is φ = 387769524480.

The previous prime is 1220111220989. The next prime is 1220111221031. The reversal of 1220111221002 is 2001221110221.

It is a super-2 number, since 2×1220111221002² (a number of 25 digits) contains 22 as substring.

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, 9596733 + ... + 9723039.

It is an arithmetic number, because the mean of its divisors is an integer number (39946736466).

Almost surely, 2^{1220111221002} is an apocalyptic number.

1220111221002 is an abundant number, since it is smaller than the sum of its proper divisors (1336479912822).

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

1220111221002 is a wasteful number, since it uses less digits than its factorization.

1220111221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127223.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220111221002 its reverse (2001221110221), we get a palindrome (3221332331223).

The spelling of 1220111221002 in words is "one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, two".