1351212151991 has 16 divisors (see below), whose sum is σ = 1499259585600. Its totient is φ = 1209817562880.

The previous prime is 1351212151957. The next prime is 1351212152053. The reversal of 1351212151991 is 1991512121531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351212151991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351242151991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7234691 + ... + 7419108.

It is an arithmetic number, because the mean of its divisors is an integer number (93703724100).

Almost surely, 2^{1351212151991} is an apocalyptic number.

1351212151991 is a deficient number, since it is larger than the sum of its proper divisors (148047433609).

1351212151991 is a wasteful number, since it uses less digits than its factorization.

1351212151991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14654026.

The product of its digits is 24300, while the sum is 41.

The spelling of 1351212151991 in words is "one trillion, three hundred fifty-one billion, two hundred twelve million, one hundred fifty-one thousand, nine hundred ninety-one".