1213246111451 has 4 divisors (see below), whose sum is σ = 1323541212504. Its totient is φ = 1102951010400.

The previous prime is 1213246111433. The next prime is 1213246111499. The reversal of 1213246111451 is 1541116423121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213246111451 is a prime.

It is a super-2 number, since 2×1213246111451² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213246011451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55147550510 + ... + 55147550531.

It is an arithmetic number, because the mean of its divisors is an integer number (330885303126).

Almost surely, 2^{1213246111451} is an apocalyptic number.

1213246111451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213246111451 is a deficient number, since it is larger than the sum of its proper divisors (110295101053).

1213246111451 is a wasteful number, since it uses less digits than its factorization.

1213246111451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110295101052.

The product of its digits is 5760, while the sum is 32.

The spelling of 1213246111451 in words is "one trillion, two hundred thirteen billion, two hundred forty-six million, one hundred eleven thousand, four hundred fifty-one".