1220412361 has 16 divisors (see below), whose sum is σ = 1469021184. Its totient is φ = 991221264.

The previous prime is 1220412331. The next prime is 1220412373. The reversal of 1220412361 is 1632140221.

It is a cyclic number.

It is not a de Polignac number, because 1220412361 - 2⁹ = 1220411849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220412311) 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, 18195 + ... + 52648.

It is an arithmetic number, because the mean of its divisors is an integer number (91813824).

Almost surely, 2^1220412361 is an apocalyptic number.

It is an amenable number.

1220412361 is a deficient number, since it is larger than the sum of its proper divisors (248608823).

1220412361 is a wasteful number, since it uses less digits than its factorization.

1220412361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70980.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1220412361 is about 34934.4008249748. The cubic root of 1220412361 is about 1068.6501045626.

Adding to 1220412361 its reverse (1632140221), we get a palindrome (2852552582).

The spelling of 1220412361 in words is "one billion, two hundred twenty million, four hundred twelve thousand, three hundred sixty-one".