12121143315541 has 16 divisors (see below), whose sum is σ = 13262497050880. Its totient is φ = 11010339020160.

The previous prime is 12121143315529. The next prime is 12121143315557. The reversal of 12121143315541 is 14551334112121.

It is a de Polignac number, because none of the positive numbers 2^k-12121143315541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121143315497 and 12121143315506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121143312541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130705 + ... + 14963926.

It is an arithmetic number, because the mean of its divisors is an integer number (828906065680).

Almost surely, 2^{12121143315541} is an apocalyptic number.

It is an amenable number.

12121143315541 is a deficient number, since it is larger than the sum of its proper divisors (1141353735339).

12121143315541 is a wasteful number, since it uses less digits than its factorization.

12121143315541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29095156.

The product of its digits is 14400, while the sum is 34.

Adding to 12121143315541 its reverse (14551334112121), we get a palindrome (26672477427662).

The spelling of 12121143315541 in words is "twelve trillion, one hundred twenty-one billion, one hundred forty-three million, three hundred fifteen thousand, five hundred forty-one".