121232254621 has 8 divisors (see below), whose sum is σ = 125791387904. Its totient is φ = 116713647360.

The previous prime is 121232254567. The next prime is 121232254681. The reversal of 121232254621 is 126452232121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121232254621 - 2⁹ = 121232254109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232254681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10125411 + ... + 10137376.

It is an arithmetic number, because the mean of its divisors is an integer number (15723923488).

Almost surely, 2^121232254621 is an apocalyptic number.

It is an amenable number.

121232254621 is a deficient number, since it is larger than the sum of its proper divisors (4559133283).

121232254621 is a wasteful number, since it uses less digits than its factorization.

121232254621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20263011.

The product of its digits is 11520, while the sum is 31.

Adding to 121232254621 its reverse (126452232121), we get a palindrome (247684486742).

The spelling of 121232254621 in words is "one hundred twenty-one billion, two hundred thirty-two million, two hundred fifty-four thousand, six hundred twenty-one".