121623101 has 4 divisors (see below), whose sum is σ = 122428704. Its totient is φ = 120817500.

The previous prime is 121623091. The next prime is 121623113. The reversal of 121623101 is 101326121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121623101 - 2¹⁸ = 121360957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121623101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121623401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402575 + ... + 402876.

It is an arithmetic number, because the mean of its divisors is an integer number (30607176).

Almost surely, 2^121623101 is an apocalyptic number.

It is an amenable number.

121623101 is a deficient number, since it is larger than the sum of its proper divisors (805603).

121623101 is an equidigital number, since it uses as much as digits as its factorization.

121623101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805602.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121623101 is about 11028.2864036078. The cubic root of 121623101 is about 495.4563027037.

Adding to 121623101 its reverse (101326121), we get a palindrome (222949222).

The spelling of 121623101 in words is "one hundred twenty-one million, six hundred twenty-three thousand, one hundred one".