121130312132221 has 32 divisors (see below), whose sum is σ = 141124824235008. Its totient is φ = 101826048153600.

The previous prime is 121130312132213. The next prime is 121130312132279. The reversal of 121130312132221 is 122231213031121.

It is a cyclic number.

It is not a de Polignac number, because 121130312132221 - 2³ = 121130312132213 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 (121130312132521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64024396 + ... + 65889178.

It is an arithmetic number, because the mean of its divisors is an integer number (4410150757344).

Almost surely, 2^{121130312132221} is an apocalyptic number.

It is an amenable number.

121130312132221 is a deficient number, since it is larger than the sum of its proper divisors (19994512102787).

121130312132221 is a wasteful number, since it uses less digits than its factorization.

121130312132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865581.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 121130312132221 its reverse (122231213031121), we get a palindrome (243361525163342).

The spelling of 121130312132221 in words is "one hundred twenty-one trillion, one hundred thirty billion, three hundred twelve million, one hundred thirty-two thousand, two hundred twenty-one".