1213883361 has 16 divisors (see below), whose sum is σ = 1801941120. Its totient is φ = 807637680.

The previous prime is 1213883353. The next prime is 1213883369. The reversal of 1213883361 is 1633883121.

1213883361 is a `hidden beast` number, since 1 + 213 + 8 + 83 + 361 = 666.

It is an interprime number because it is at equal distance from previous prime (1213883353) and next prime (1213883369).

It is not a de Polignac number, because 1213883361 - 2³ = 1213883353 is a prime.

It is a super-2 number, since 2×1213883361² = 2947025628225312642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213883369) 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, 31110 + ... + 58271.

It is an arithmetic number, because the mean of its divisors is an integer number (112621320).

Almost surely, 2^1213883361 is an apocalyptic number.

It is an amenable number.

1213883361 is a deficient number, since it is larger than the sum of its proper divisors (588057759).

1213883361 is an equidigital number, since it uses as much as digits as its factorization.

1213883361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89893 (or 89887 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1213883361 is about 34840.8289367518. The cubic root of 1213883361 is about 1066.7409968493.

The spelling of 1213883361 in words is "one billion, two hundred thirteen million, eight hundred eighty-three thousand, three hundred sixty-one".