1312212020 has 96 divisors (see below), whose sum is σ = 3269984256. Its totient is φ = 432835200.

The previous prime is 1312211987. The next prime is 1312212047. The reversal of 1312212020 is 202122131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1312211986 and 1312212004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 828149 + ... + 829731.

It is an arithmetic number, because the mean of its divisors is an integer number (34062336).

Almost surely, 2^1312212020 is an apocalyptic number.

1312212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634992128).

1312212020 is an abundant number, since it is smaller than the sum of its proper divisors (1957772236).

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

1312212020 is a wasteful number, since it uses less digits than its factorization.

1312212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1312212020 is about 36224.4671458394. The cubic root of 1312212020 is about 1094.7997020402.

Adding to 1312212020 its reverse (202122131), we get a palindrome (1514334151).

The spelling of 1312212020 in words is "one billion, three hundred twelve million, two hundred twelve thousand, twenty".