121100623 has 16 divisors (see below), whose sum is σ = 148792320. Its totient is φ = 96240096.

The previous prime is 121100621. The next prime is 121100633. The reversal of 121100623 is 326001121.

It is a cyclic number.

It is not a de Polignac number, because 121100623 - 2¹ = 121100621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100597 and 121100606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100621) 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, 3436 + ... + 15937.

It is an arithmetic number, because the mean of its divisors is an integer number (9299520).

Almost surely, 2^121100623 is an apocalyptic number.

121100623 is a deficient number, since it is larger than the sum of its proper divisors (27691697).

121100623 is a wasteful number, since it uses less digits than its factorization.

121100623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19446.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121100623 is about 11004.5728222408. The cubic root of 121100623 is about 494.7458110636.

Adding to 121100623 its reverse (326001121), we get a palindrome (447101744).

The spelling of 121100623 in words is "one hundred twenty-one million, one hundred thousand, six hundred twenty-three".