1220652111 has 16 divisors (see below), whose sum is σ = 1865993984. Its totient is φ = 695283264.

The previous prime is 1220652101. The next prime is 1220652161. The reversal of 1220652111 is 1112560221.

It is not a de Polignac number, because 1220652111 - 2¹⁰ = 1220651087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220652101) 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, 86281 + ... + 99426.

It is an arithmetic number, because the mean of its divisors is an integer number (116624624).

Almost surely, 2^1220652111 is an apocalyptic number.

1220652111 is a deficient number, since it is larger than the sum of its proper divisors (645341873).

1220652111 is a wasteful number, since it uses less digits than its factorization.

1220652111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186030.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1220652111 is about 34937.8320878672. The cubic root of 1220652111 is about 1068.7200787492.

The spelling of 1220652111 in words is "one billion, two hundred twenty million, six hundred fifty-two thousand, one hundred eleven".