1311212001 has 8 divisors (see below), whose sum is σ = 1907217504. Its totient is φ = 794673920.

The previous prime is 1311211999. The next prime is 1311212009. The reversal of 1311212001 is 1002121131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311212001 - 2¹ = 1311211999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311212009) 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, 19866816 + ... + 19866881.

It is an arithmetic number, because the mean of its divisors is an integer number (238402188).

Almost surely, 2^1311212001 is an apocalyptic number.

1311212001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1311212001 is a deficient number, since it is larger than the sum of its proper divisors (596005503).

1311212001 is a wasteful number, since it uses less digits than its factorization.

1311212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39733711.

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

The square root of 1311212001 is about 36210.6614272648. The cubic root of 1311212001 is about 1094.5215206893.

Adding to 1311212001 its reverse (1002121131), we get a palindrome (2313333132).

It can be divided in two parts, 1311 and 212001, that added together give a palindrome (213312).

The spelling of 1311212001 in words is "one billion, three hundred eleven million, two hundred twelve thousand, one".