121330231011 has 24 divisors (see below), whose sum is σ = 193607132160. Its totient is φ = 72602665200.

The previous prime is 121330230979. The next prime is 121330231031. The reversal of 121330231011 is 110132033121.

121330231011 is a `hidden beast` number, since 1 + 21 + 330 + 2 + 310 + 1 + 1 = 666.

It is not a de Polignac number, because 121330231011 - 2⁵ = 121330230979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121330231031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7748875 + ... + 7764516.

It is an arithmetic number, because the mean of its divisors is an integer number (8066963840).

Almost surely, 2^121330231011 is an apocalyptic number.

121330231011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121330231011 is a deficient number, since it is larger than the sum of its proper divisors (72276901149).

121330231011 is a wasteful number, since it uses less digits than its factorization.

121330231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15513487 (or 15513484 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121330231011 its reverse (110132033121), we get a palindrome (231462264132).

The spelling of 121330231011 in words is "one hundred twenty-one billion, three hundred thirty million, two hundred thirty-one thousand, eleven".