121111001121023 has 4 divisors (see below), whose sum is σ = 121913060731248. Its totient is φ = 120308941510800.

The previous prime is 121111001120957. The next prime is 121111001121059. The reversal of 121111001121023 is 320121100111121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121111001121023 - 2³⁴ = 121093821251839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111001120992 and 121111001121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111001121083) 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, 401029804886 + ... + 401029805187.

It is an arithmetic number, because the mean of its divisors is an integer number (30478265182812).

Almost surely, 2^{121111001121023} is an apocalyptic number.

121111001121023 is a deficient number, since it is larger than the sum of its proper divisors (802059610225).

121111001121023 is an equidigital number, since it uses as much as digits as its factorization.

121111001121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802059610224.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 121111001121023 its reverse (320121100111121), we get a palindrome (441232101232144).

The spelling of 121111001121023 in words is "one hundred twenty-one trillion, one hundred eleven billion, one million, one hundred twenty-one thousand, twenty-three".