1312223020 has 24 divisors (see below), whose sum is σ = 2764007568. Its totient is φ = 523300800.

The previous prime is 1312222991. The next prime is 1312223021. The reversal of 1312223020 is 203222131.

It is a junction number, because it is equal to n+sod(n) for n = 1312222985 and 1312223003.

It is not an unprimeable number, because it can be changed into a prime (1312223021) 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, 92491 + ... + 105730.

It is an arithmetic number, because the mean of its divisors is an integer number (115166982).

Almost surely, 2^1312223020 is an apocalyptic number.

1312223020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312223020 is an abundant number, since it is smaller than the sum of its proper divisors (1451784548).

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

1312223020 is a wasteful number, since it uses less digits than its factorization.

1312223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198561 (or 198559 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1312223020 is about 36224.6189766021. The cubic root of 1312223020 is about 1094.8027611909.

Adding to 1312223020 its reverse (203222131), we get a palindrome (1515445151).

The spelling of 1312223020 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, twenty".