121621101 has 32 divisors (see below), whose sum is σ = 190771200. Its totient is φ = 67480896.

The previous prime is 121621067. The next prime is 121621121. The reversal of 121621101 is 101126121.

It is a happy number.

It is not a de Polignac number, because 121621101 - 2⁷ = 121620973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121621121) 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, 146650 + ... + 147476.

It is an arithmetic number, because the mean of its divisors is an integer number (5961600).

Almost surely, 2^121621101 is an apocalyptic number.

It is an amenable number.

121621101 is a deficient number, since it is larger than the sum of its proper divisors (69150099).

121621101 is a wasteful number, since it uses less digits than its factorization.

121621101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 121621101 is about 11028.1957273164. The cubic root of 121621101 is about 495.4535868873.

Adding to 121621101 its reverse (101126121), we get a palindrome (222747222).

The spelling of 121621101 in words is "one hundred twenty-one million, six hundred twenty-one thousand, one hundred one".