1131200321 has 8 divisors (see below), whose sum is σ = 1195852320. Its totient is φ = 1067059872.

The previous prime is 1131200311. The next prime is 1131200351. The reversal of 1131200321 is 1230021311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131200321 - 2¹⁸ = 1130938177 is a prime.

It is a super-2 number, since 2×1131200321² = 2559228332461006082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131200296 and 1131200305.

It is not an unprimeable number, because it can be changed into a prime (1131200311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123335 + ... + 132188.

It is an arithmetic number, because the mean of its divisors is an integer number (149481540).

Almost surely, 2^1131200321 is an apocalyptic number.

It is an amenable number.

1131200321 is a deficient number, since it is larger than the sum of its proper divisors (64651999).

1131200321 is a wasteful number, since it uses less digits than its factorization.

1131200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255775.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131200321 is about 33633.3215873782. The cubic root of 1131200321 is about 1041.9491064674.

Adding to 1131200321 its reverse (1230021311), we get a palindrome (2361221632).

The spelling of 1131200321 in words is "one billion, one hundred thirty-one million, two hundred thousand, three hundred twenty-one".