1232130021221 has 4 divisors (see below), whose sum is σ = 1344141841344. Its totient is φ = 1120118201100.

The previous prime is 1232130021203. The next prime is 1232130021229. The reversal of 1232130021221 is 1221200312321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1232130021221 - 2¹⁰ = 1232130020197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232130021193 and 1232130021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232130021229) 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, 56005910045 + ... + 56005910066.

It is an arithmetic number, because the mean of its divisors is an integer number (336035460336).

Almost surely, 2^{1232130021221} is an apocalyptic number.

1232130021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1232130021221 is a deficient number, since it is larger than the sum of its proper divisors (112011820123).

1232130021221 is a wasteful number, since it uses less digits than its factorization.

1232130021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112011820122.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1232130021221 its reverse (1221200312321), we get a palindrome (2453330333542).

The spelling of 1232130021221 in words is "one trillion, two hundred thirty-two billion, one hundred thirty million, twenty-one thousand, two hundred twenty-one".