121116150557 has 4 divisors (see below), whose sum is σ = 121123560636. Its totient is φ = 121108740480.

The previous prime is 121116150517. The next prime is 121116150581. The reversal of 121116150557 is 755051611121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755051611121 = 563 ⋅1341121867.

It can be written as a sum of positive squares in 2 ways, for example, as 26708057476 + 94408093081 = 163426^2 + 307259^2 .

It is a cyclic number.

It is not a de Polignac number, because 121116150557 - 2²⁰ = 121115101981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121116150517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3680468 + ... + 3713229.

It is an arithmetic number, because the mean of its divisors is an integer number (30280890159).

Almost surely, 2^121116150557 is an apocalyptic number.

It is an amenable number.

121116150557 is a deficient number, since it is larger than the sum of its proper divisors (7410079).

121116150557 is an equidigital number, since it uses as much as digits as its factorization.

121116150557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7410078.

The product of its (nonzero) digits is 10500, while the sum is 35.

Adding to 121116150557 its reverse (755051611121), we get a palindrome (876167761678).

The spelling of 121116150557 in words is "one hundred twenty-one billion, one hundred sixteen million, one hundred fifty thousand, five hundred fifty-seven".