11451212154 has 12 divisors (see below), whose sum is σ = 24810959706. Its totient is φ = 3817070712.

The previous prime is 11451212153. The next prime is 11451212197. The reversal of 11451212154 is 45121215411.

11451212154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6631659225 + 4819552929 = 81435^2 + 69423^2 .

It is a super-3 number, since 3×11451212154³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (11451212153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318089209 + ... + 318089244.

Almost surely, 2^11451212154 is an apocalyptic number.

11451212154 is an abundant number, since it is smaller than the sum of its proper divisors (13359747552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11451212154 is a wasteful number, since it uses less digits than its factorization.

11451212154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636178461 (or 636178458 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

Adding to 11451212154 its reverse (45121215411), we get a palindrome (56572427565).

It can be divided in two parts, 11 and 451212154, that multiplied together give a palindrome (4963333694).

The spelling of 11451212154 in words is "eleven billion, four hundred fifty-one million, two hundred twelve thousand, one hundred fifty-four".