1521251121 has 8 divisors (see below), whose sum is σ = 2184360640. Its totient is φ = 936154512.

The previous prime is 1521251117. The next prime is 1521251129. The reversal of 1521251121 is 1211521251.

1521251121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1521251121 - 2² = 1521251117 is a prime.

It is a super-3 number, since 3×1521251121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521251129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19503181 + ... + 19503258.

It is an arithmetic number, because the mean of its divisors is an integer number (273045080).

Almost surely, 2^1521251121 is an apocalyptic number.

It is an amenable number.

1521251121 is a deficient number, since it is larger than the sum of its proper divisors (663109519).

1521251121 is a wasteful number, since it uses less digits than its factorization.

1521251121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006455.

The product of its digits is 200, while the sum is 21.

The square root of 1521251121 is about 39003.2193671240. The cubic root of 1521251121 is about 1150.0947926903.

Adding to 1521251121 its reverse (1211521251), we get a palindrome (2732772372).

The spelling of 1521251121 in words is "one billion, five hundred twenty-one million, two hundred fifty-one thousand, one hundred twenty-one".