1312213420 has 24 divisors (see below), whose sum is σ = 3149312544. Its totient is φ = 449901696.

The previous prime is 1312213417. The next prime is 1312213423. The reversal of 1312213420 is 243122131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1312213417) and next prime (1312213423).

It is not an unprimeable number, because it can be changed into a prime (1312213423) 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, 4686337 + ... + 4686616.

It is an arithmetic number, because the mean of its divisors is an integer number (131221356).

Almost surely, 2^1312213420 is an apocalyptic number.

1312213420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312213420 is an abundant number, since it is smaller than the sum of its proper divisors (1837099124).

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

1312213420 is a wasteful number, since it uses less digits than its factorization.

1312213420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372969 (or 9372967 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1312213420 is about 36224.4864697900. The cubic root of 1312213420 is about 1094.8000913876.

Adding to 1312213420 its reverse (243122131), we get a palindrome (1555335551).

The spelling of 1312213420 in words is "one billion, three hundred twelve million, two hundred thirteen thousand, four hundred twenty".