1220137799 has 16 divisors (see below), whose sum is σ = 1262169216. Its totient is φ = 1179016800.

The previous prime is 1220137783. The next prime is 1220137811. The reversal of 1220137799 is 9977310221.

It is a cyclic number.

It is not a de Polignac number, because 1220137799 - 2⁴ = 1220137783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220137739) 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, 854324 + ... + 855750.

It is an arithmetic number, because the mean of its divisors is an integer number (78885576).

Almost surely, 2^1220137799 is an apocalyptic number.

1220137799 is a deficient number, since it is larger than the sum of its proper divisors (42031417).

1220137799 is a wasteful number, since it uses less digits than its factorization.

1220137799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1220137799 is about 34930.4709243949. The cubic root of 1220137799 is about 1068.5699587786.

The spelling of 1220137799 in words is "one billion, two hundred twenty million, one hundred thirty-seven thousand, seven hundred ninety-nine".