121621113 has 12 divisors (see below), whose sum is σ = 175771440. Its totient is φ = 81036216.

The previous prime is 121621067. The next prime is 121621121. The reversal of 121621113 is 311126121.

It is not a de Polignac number, because 121621113 - 2⁸ = 121620857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121621133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26718 + ... + 30936.

It is an arithmetic number, because the mean of its divisors is an integer number (14647620).

Almost surely, 2^121621113 is an apocalyptic number.

It is an amenable number.

121621113 is a deficient number, since it is larger than the sum of its proper divisors (54150327).

121621113 is a wasteful number, since it uses less digits than its factorization.

121621113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428 (or 7425 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 121621113 is about 11028.1962713764. The cubic root of 121621113 is about 495.4536031823.

Adding to 121621113 its reverse (311126121), we get a palindrome (432747234).

The spelling of 121621113 in words is "one hundred twenty-one million, six hundred twenty-one thousand, one hundred thirteen".