121020210023 has 4 divisors (see below), whose sum is σ = 121032198768. Its totient is φ = 121008221280.

The previous prime is 121020210013. The next prime is 121020210037. The reversal of 121020210023 is 320012020121.

It is a happy number.

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 121020210023 - 2¹⁰ = 121020208999 is a prime.

It is a super-2 number, since 2×121020210023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020210013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5979218 + ... + 5999423.

It is an arithmetic number, because the mean of its divisors is an integer number (30258049692).

Almost surely, 2^121020210023 is an apocalyptic number.

121020210023 is a deficient number, since it is larger than the sum of its proper divisors (11988745).

121020210023 is a wasteful number, since it uses less digits than its factorization.

121020210023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988744.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121020210023 its reverse (320012020121), we get a palindrome (441032230144).

The spelling of 121020210023 in words is "one hundred twenty-one billion, twenty million, two hundred ten thousand, twenty-three".