1220111111000 has 64 divisors (see below), whose sum is σ = 2921456846880. Its totient is φ = 476694556800.

The previous prime is 1220111110969. The next prime is 1220111111029. The reversal of 1220111111000 is 1111110221.

It is a super-2 number, since 2×1220111111000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 14144339 + ... + 14230338.

Almost surely, 2^{1220111111000} is an apocalyptic number.

1220111111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111111000 is an abundant number, since it is smaller than the sum of its proper divisors (1701345735880).

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

1220111111000 is a wasteful number, since it uses less digits than its factorization.

1220111111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28374741 (or 28374727 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1220111111000 its reverse (1111110221), we get a palindrome (1221222221221).

The spelling of 1220111111000 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand".