1131321210 has 16 divisors (see below), whose sum is σ = 2715170976. Its totient is φ = 301685648.

The previous prime is 1131321209. The next prime is 1131321211. The reversal of 1131321210 is 121231311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131321209) and next prime (1131321211).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1131321210.

It is not an unprimeable number, because it can be changed into a prime (1131321211) 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, 18855324 + ... + 18855383.

It is an arithmetic number, because the mean of its divisors is an integer number (169698186).

Almost surely, 2^1131321210 is an apocalyptic number.

1131321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131321210 is an abundant number, since it is smaller than the sum of its proper divisors (1583849766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131321210 is a wasteful number, since it uses less digits than its factorization.

1131321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37710717.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1131321210 is about 33635.1187005487. The cubic root of 1131321210 is about 1041.9862221154.

Adding to 1131321210 its reverse (121231311), we get a palindrome (1252552521).

It can be divided in two parts, 11313 and 21210, that added together give a palindrome (32523).

The spelling of 1131321210 in words is "one billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred ten".