121000231132221 has 32 divisors (see below), whose sum is σ = 187116539270400. Its totient is φ = 68122805667840.

The previous prime is 121000231132217. The next prime is 121000231132259. The reversal of 121000231132221 is 122231132000121.

It is not a de Polignac number, because 121000231132221 - 2² = 121000231132217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000231132271) 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, 114671656 + ... + 115722033.

It is an arithmetic number, because the mean of its divisors is an integer number (5847391852200).

Almost surely, 2^{121000231132221} is an apocalyptic number.

It is an amenable number.

121000231132221 is a deficient number, since it is larger than the sum of its proper divisors (66116308138179).

121000231132221 is a wasteful number, since it uses less digits than its factorization.

121000231132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230394069.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121000231132221 its reverse (122231132000121), we get a palindrome (243231363132342).

The spelling of 121000231132221 in words is "one hundred twenty-one trillion, two hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty-one".