121211201023 has 48 divisors (see below), whose sum is σ = 140166784800. Its totient is φ = 104599756800.

The previous prime is 121211201017. The next prime is 121211201053. The reversal of 121211201023 is 320102112121.

It is not a de Polignac number, because 121211201023 - 2¹⁷ = 121211069951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211200988 and 121211201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211201053) 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 47 ways as a sum of consecutive naturals, for example, 60273088 + ... + 60275098.

It is an arithmetic number, because the mean of its divisors is an integer number (2920141350).

Almost surely, 2^121211201023 is an apocalyptic number.

121211201023 is a deficient number, since it is larger than the sum of its proper divisors (18955583777).

121211201023 is a wasteful number, since it uses less digits than its factorization.

121211201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344 (or 2333 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121211201023 its reverse (320102112121), we get a palindrome (441313313144).

The spelling of 121211201023 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred one thousand, twenty-three".