121232121 has 16 divisors (see below), whose sum is σ = 166242048. Its totient is φ = 78537600.

The previous prime is 121232119. The next prime is 121232123.

121232121 is nontrivially palindromic in base 10.

121232121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (121232119) and next prime (121232123).

It is not a de Polignac number, because 121232121 - 2¹ = 121232119 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121232121.

It is not an unprimeable number, because it can be changed into a prime (121232123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31515 + ... + 35151.

It is an arithmetic number, because the mean of its divisors is an integer number (10390128).

Almost surely, 2^121232121 is an apocalyptic number.

It is an amenable number.

121232121 is a deficient number, since it is larger than the sum of its proper divisors (45009927).

121232121 is a wasteful number, since it uses less digits than its factorization.

121232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952.

The product of its digits is 48, while the sum is 15.

The square root of 121232121 is about 11010.5458992731. The cubic root of 121232121 is about 494.9248207425.

It can be divided in two parts, 1212 and 32121, that added together give a palindrome (33333).

The spelling of 121232121 in words is "one hundred twenty-one million, two hundred thirty-two thousand, one hundred twenty-one".