1220012112111 has 16 divisors (see below), whose sum is σ = 1789084867584. Its totient is φ = 734802711264.

The previous prime is 1220012112091. The next prime is 1220012112119. The reversal of 1220012112111 is 1112112100221.

It is a happy number.

It is not a de Polignac number, because 1220012112111 - 2²¹ = 1220010014959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012112119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332789251 + ... + 332792916.

It is an arithmetic number, because the mean of its divisors is an integer number (111817804224).

Almost surely, 2^{1220012112111} is an apocalyptic number.

1220012112111 is a deficient number, since it is larger than the sum of its proper divisors (569072755473).

1220012112111 is a wasteful number, since it uses less digits than its factorization.

1220012112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665582230.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1220012112111 its reverse (1112112100221), we get a palindrome (2332124212332).

The spelling of 1220012112111 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twelve thousand, one hundred eleven".