1312101021 has 64 divisors (see below), whose sum is σ = 2358927360. Its totient is φ = 627778560.

The previous prime is 1312101017. The next prime is 1312101029. The reversal of 1312101021 is 1201012131.

It is not a de Polignac number, because 1312101021 - 2² = 1312101017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312100988 and 1312101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312101029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181015 + ... + 188123.

It is an arithmetic number, because the mean of its divisors is an integer number (36858240).

Almost surely, 2^1312101021 is an apocalyptic number.

1312101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312101021 is a deficient number, since it is larger than the sum of its proper divisors (1046826339).

1312101021 is a wasteful number, since it uses less digits than its factorization.

1312101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1312101021 is about 36222.9350136071. The cubic root of 1312101021 is about 1094.7688317497.

Adding to 1312101021 its reverse (1201012131), we get a palindrome (2513113152).

It can be divided in two parts, 131210 and 1021, that added together give a palindrome (132231).

The spelling of 1312101021 in words is "one billion, three hundred twelve million, one hundred one thousand, twenty-one".