121123203011 has 4 divisors (see below), whose sum is σ = 121138278000. Its totient is φ = 121108128024.

The previous prime is 121123203001. The next prime is 121123203023. The reversal of 121123203011 is 110302321121.

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 121123203011 - 2¹⁸ = 121122940867 is a prime.

It is a super-2 number, since 2×121123203011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121123203001) 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, 7525436 + ... + 7541513.

It is an arithmetic number, because the mean of its divisors is an integer number (30284569500).

Almost surely, 2^121123203011 is an apocalyptic number.

121123203011 is a deficient number, since it is larger than the sum of its proper divisors (15074989).

121123203011 is an equidigital number, since it uses as much as digits as its factorization.

121123203011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15074988.

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

Adding to 121123203011 its reverse (110302321121), we get a palindrome (231425524132).

It can be divided in two parts, 12112 and 3203011, that added together give a palindrome (3215123).

The spelling of 121123203011 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred three thousand, eleven".