113421121521 has 8 divisors (see below), whose sum is σ = 153142442880. Its totient is φ = 74656940592.

The previous prime is 113421121469. The next prime is 113421121537. The reversal of 113421121521 is 125121124311.

It is a happy number.

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

It is not a de Polignac number, because 113421121521 - 2¹³ = 113421113329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113421121491 and 113421121500.

It is not an unprimeable number, because it can be changed into a prime (113421121621) 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, 239284830 + ... + 239285303.

It is an arithmetic number, because the mean of its divisors is an integer number (19142805360).

Almost surely, 2^113421121521 is an apocalyptic number.

It is an amenable number.

113421121521 is a deficient number, since it is larger than the sum of its proper divisors (39721321359).

113421121521 is an equidigital number, since it uses as much as digits as its factorization.

113421121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478570215.

The product of its digits is 480, while the sum is 24.

Adding to 113421121521 its reverse (125121124311), we get a palindrome (238542245832).

The spelling of 113421121521 in words is "one hundred thirteen billion, four hundred twenty-one million, one hundred twenty-one thousand, five hundred twenty-one".