13542220121 has 8 divisors (see below), whose sum is σ = 13832671104. Its totient is φ = 13251865840.

The previous prime is 13542220051. The next prime is 13542220123. The reversal of 13542220121 is 12102224531.

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

It is a cyclic number.

It is not a de Polignac number, because 13542220121 - 2¹⁴ = 13542203737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13542220123) 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, 306971 + ... + 348303.

It is an arithmetic number, because the mean of its divisors is an integer number (1729083888).

Almost surely, 2^13542220121 is an apocalyptic number.

It is an amenable number.

13542220121 is a deficient number, since it is larger than the sum of its proper divisors (290450983).

13542220121 is an equidigital number, since it uses as much as digits as its factorization.

13542220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48351.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 13542220121 its reverse (12102224531), we get a palindrome (25644444652).

The spelling of 13542220121 in words is "thirteen billion, five hundred forty-two million, two hundred twenty thousand, one hundred twenty-one".