1220209975 has 24 divisors (see below), whose sum is σ = 1557400320. Its totient is φ = 947965920.

The previous prime is 1220209973. The next prime is 1220209993. The reversal of 1220209975 is 5799020221.

It is not a de Polignac number, because 1220209975 - 2¹ = 1220209973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220209973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117442 + ... + 127408.

It is an arithmetic number, because the mean of its divisors is an integer number (64891680).

Almost surely, 2^1220209975 is an apocalyptic number.

1220209975 is a deficient number, since it is larger than the sum of its proper divisors (337190345).

1220209975 is an equidigital number, since it uses as much as digits as its factorization.

1220209975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10119 (or 10114 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1220209975 is about 34931.5040472064. The cubic root of 1220209975 is about 1068.5910284165.

The spelling of 1220209975 in words is "one billion, two hundred twenty million, two hundred nine thousand, nine hundred seventy-five".