1220020120111 has 32 divisors (see below), whose sum is σ = 1387217484800. Its totient is φ = 1063664421120.

The previous prime is 1220020120091. The next prime is 1220020120169. The reversal of 1220020120111 is 1110210200221.

It is a cyclic number.

It is not a de Polignac number, because 1220020120111 - 2²⁷ = 1219885902383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220020120091 and 1220020120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220020120181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281953030 + ... + 281957356.

It is an arithmetic number, because the mean of its divisors is an integer number (43350546400).

Almost surely, 2^{1220020120111} is an apocalyptic number.

1220020120111 is a deficient number, since it is larger than the sum of its proper divisors (167197364689).

1220020120111 is a wasteful number, since it uses less digits than its factorization.

1220020120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220020120111 its reverse (1110210200221), we get a palindrome (2330230320332).

The spelling of 1220020120111 in words is "one trillion, two hundred twenty billion, twenty million, one hundred twenty thousand, one hundred eleven".