1220120012111 has 32 divisors (see below), whose sum is σ = 1653232627200. Its totient is φ = 869557265280.

The previous prime is 1220120012101. The next prime is 1220120012149. The reversal of 1220120012111 is 1112100210221.

It is not a de Polignac number, because 1220120012111 - 2³⁴ = 1202940142927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120012101) 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, 5482181 + ... + 5700398.

It is an arithmetic number, because the mean of its divisors is an integer number (51663519600).

Almost surely, 2^{1220120012111} is an apocalyptic number.

1220120012111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220120012111 is a deficient number, since it is larger than the sum of its proper divisors (433112615089).

1220120012111 is a wasteful number, since it uses less digits than its factorization.

1220120012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182719.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220120012111 its reverse (1112100210221), we get a palindrome (2332220222332).

The spelling of 1220120012111 in words is "one trillion, two hundred twenty billion, one hundred twenty million, twelve thousand, one hundred eleven".