1220111111002 has 16 divisors (see below), whose sum is σ = 2182559006592. Its totient is φ = 500169772080.

The previous prime is 1220111110969. The next prime is 1220111111029. The reversal of 1220111111002 is 2001111110221.

It is a happy number.

It is a super-2 number, since 2×1220111111002² (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 7 ways as a sum of consecutive naturals, for example, 1894582149 + ... + 1894582792.

It is an arithmetic number, because the mean of its divisors is an integer number (136409937912).

Almost surely, 2^{1220111111002} is an apocalyptic number.

1220111111002 is a deficient number, since it is larger than the sum of its proper divisors (962447895590).

1220111111002 is a wasteful number, since it uses less digits than its factorization.

1220111111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789164973.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1220111111002 its reverse (2001111110221), we get a palindrome (3221222221223).

The spelling of 1220111111002 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, two".