12123132213021 has 8 divisors (see below), whose sum is σ = 17014922404320. Its totient is φ = 7656715081872.

The previous prime is 12123132212959. The next prime is 12123132213037. The reversal of 12123132213021 is 12031223132121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12123132213021 - 2⁶ = 12123132212957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12123132212982 and 12123132213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123132213221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106343264970 + ... + 106343265083.

It is an arithmetic number, because the mean of its divisors is an integer number (2126865300540).

Almost surely, 2^{12123132213021} is an apocalyptic number.

It is an amenable number.

12123132213021 is a deficient number, since it is larger than the sum of its proper divisors (4891790191299).

12123132213021 is a wasteful number, since it uses less digits than its factorization.

12123132213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212686530075.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12123132213021 its reverse (12031223132121), we get a palindrome (24154355345142).

The spelling of 12123132213021 in words is "twelve trillion, one hundred twenty-three billion, one hundred thirty-two million, two hundred thirteen thousand, twenty-one".