1220119639 has 4 divisors (see below), whose sum is σ = 1262192760. Its totient is φ = 1178046520.

The previous prime is 1220119633. The next prime is 1220119661. The reversal of 1220119639 is 9369110221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9369110221 = 52999 ⋅176779.

It is a cyclic number.

It is not a de Polignac number, because 1220119639 - 2⁹ = 1220119127 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 (1220119633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21036517 + ... + 21036574.

It is an arithmetic number, because the mean of its divisors is an integer number (315548190).

Almost surely, 2^1220119639 is an apocalyptic number.

1220119639 is a deficient number, since it is larger than the sum of its proper divisors (42073121).

1220119639 is an equidigital number, since it uses as much as digits as its factorization.

1220119639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42073120.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1220119639 is about 34930.2109784639. The cubic root of 1220119639 is about 1068.5646573756.

The spelling of 1220119639 in words is "one billion, two hundred twenty million, one hundred nineteen thousand, six hundred thirty-nine".