1312211400 has 96 divisors (see below), whose sum is σ = 4199136000. Its totient is φ = 338630400.

The previous prime is 1312211363. The next prime is 1312211429. The reversal of 1312211400 is 41122131.

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 1312211400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16675 + ... + 53874.

It is an arithmetic number, because the mean of its divisors is an integer number (43741000).

Almost surely, 2^1312211400 is an apocalyptic number.

1312211400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312211400 is an abundant number, since it is smaller than the sum of its proper divisors (2886924600).

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

1312211400 is a wasteful number, since it uses less digits than its factorization.

1312211400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70599 (or 70590 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1312211400 is about 36224.4585880866. The cubic root of 1312211400 is about 1094.7995296148.

Adding to 1312211400 its reverse (41122131), we get a palindrome (1353333531).

The spelling of 1312211400 in words is "one billion, three hundred twelve million, two hundred eleven thousand, four hundred".