1213455541111 has 12 divisors (see below), whose sum is σ = 1353705684856. Its totient is φ = 1086676596720.

The previous prime is 1213455541091. The next prime is 1213455541139. The reversal of 1213455541111 is 1111455543121.

It is a de Polignac number, because none of the positive numbers 2^k-1213455541111 is a prime.

It is a super-2 number, since 2×1213455541111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213455541171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74831880 + ... + 74848093.

Almost surely, 2^{1213455541111} is an apocalyptic number.

1213455541111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213455541111 is a deficient number, since it is larger than the sum of its proper divisors (140250143745).

1213455541111 is a wasteful number, since it uses less digits than its factorization.

1213455541111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149680062 (or 149680051 counting only the distinct ones).

The product of its digits is 12000, while the sum is 34.

The spelling of 1213455541111 in words is "one trillion, two hundred thirteen billion, four hundred fifty-five million, five hundred forty-one thousand, one hundred eleven".