121211130023 has 4 divisors (see below), whose sum is σ = 121309119240. Its totient is φ = 121113140808.

The previous prime is 121211129989. The next prime is 121211130077. The reversal of 121211130023 is 320031112121.

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 121211130023 - 2⁶ = 121211129959 is a prime.

It is a super-2 number, since 2×121211130023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211129983 and 121211130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211136023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48992753 + ... + 48995226.

It is an arithmetic number, because the mean of its divisors is an integer number (30327279810).

Almost surely, 2^121211130023 is an apocalyptic number.

121211130023 is a deficient number, since it is larger than the sum of its proper divisors (97989217).

121211130023 is an equidigital number, since it uses as much as digits as its factorization.

121211130023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97989216.

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

Adding to 121211130023 its reverse (320031112121), we get a palindrome (441242242144).

The spelling of 121211130023 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred thirty thousand, twenty-three".