11742510001221 has 16 divisors (see below), whose sum is σ = 17397051347520. Its totient is φ = 7828006895280.

The previous prime is 11742510001177. The next prime is 11742510001223. The reversal of 11742510001221 is 12210001524711.

11742510001221 is a `hidden beast` number, since 1 + 1 + 7 + 425 + 10 + 0 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 11742510001221 - 2¹⁰ = 11742510000197 is a prime.

It is a super-2 number, since 2×11742510001221² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11742510001223) 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 15 ways as a sum of consecutive naturals, for example, 8605830 + ... + 9876503.

It is an arithmetic number, because the mean of its divisors is an integer number (1087315709220).

Almost surely, 2^{11742510001221} is an apocalyptic number.

It is an amenable number.

11742510001221 is a deficient number, since it is larger than the sum of its proper divisors (5654541346299).

11742510001221 is a wasteful number, since it uses less digits than its factorization.

11742510001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18505873 (or 18505867 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

Adding to 11742510001221 its reverse (12210001524711), we get a palindrome (23952511525932).

The spelling of 11742510001221 in words is "eleven trillion, seven hundred forty-two billion, five hundred ten million, one thousand, two hundred twenty-one".