11521142025 has 12 divisors (see below), whose sum is σ = 19048288272. Its totient is φ = 6144609040.

The previous prime is 11521141949. The next prime is 11521142047. The reversal of 11521142025 is 52024112511.

It is a happy number.

It is not a de Polignac number, because 11521142025 - 2¹⁰ = 11521141001 is a prime.

It is a super-2 number, since 2×11521142025² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11521141986 and 11521142004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76807539 + ... + 76807688.

It is an arithmetic number, because the mean of its divisors is an integer number (1587357356).

Almost surely, 2^11521142025 is an apocalyptic number.

11521142025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11521142025 is a deficient number, since it is larger than the sum of its proper divisors (7527146247).

11521142025 is a wasteful number, since it uses less digits than its factorization.

11521142025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153615240 (or 153615235 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 11521142025 its reverse (52024112511), we get a palindrome (63545254536).

The spelling of 11521142025 in words is "eleven billion, five hundred twenty-one million, one hundred forty-two thousand, twenty-five".