121551554041 has 4 divisors (see below), whose sum is σ = 121562678772. Its totient is φ = 121540429312.

The previous prime is 121551554011. The next prime is 121551554083. The reversal of 121551554041 is 140455155121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97736891641 + 23814662400 = 312629^2 + 154320^2 .

It is a cyclic number.

It is not a de Polignac number, because 121551554041 - 2⁷ = 121551553913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121551553988 and 121551554006.

It is not an unprimeable number, because it can be changed into a prime (121551554011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545960 + ... + 5567833.

It is an arithmetic number, because the mean of its divisors is an integer number (30390669693).

Almost surely, 2^121551554041 is an apocalyptic number.

It is an amenable number.

121551554041 is a deficient number, since it is larger than the sum of its proper divisors (11124731).

121551554041 is a wasteful number, since it uses less digits than its factorization.

121551554041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124730.

The product of its (nonzero) digits is 20000, while the sum is 34.

The spelling of 121551554041 in words is "one hundred twenty-one billion, five hundred fifty-one million, five hundred fifty-four thousand, forty-one".