121541031205 has 16 divisors (see below), whose sum is σ = 159144326208. Its totient is φ = 88373440000.

The previous prime is 121541031179. The next prime is 121541031229. The reversal of 121541031205 is 502130145121.

It is not a de Polignac number, because 121541031205 - 2⁷ = 121541031077 is a prime.

It is a super-3 number, since 3×121541031205³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121541031205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3436 + ... + 493045.

It is an arithmetic number, because the mean of its divisors is an integer number (9946520388).

Almost surely, 2^121541031205 is an apocalyptic number.

It is an amenable number.

121541031205 is a deficient number, since it is larger than the sum of its proper divisors (37603295003).

121541031205 is a wasteful number, since it uses less digits than its factorization.

121541031205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500948.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 121541031205 its reverse (502130145121), we get a palindrome (623671176326).

The spelling of 121541031205 in words is "one hundred twenty-one billion, five hundred forty-one million, thirty-one thousand, two hundred five".