221201212131323 has 4 divisors (see below), whose sum is σ = 221201310046080. Its totient is φ = 221201114216568.

The previous prime is 221201212131281. The next prime is 221201212131337. The reversal of 221201212131323 is 323131212102122.

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 221201212131323 - 2²⁸ = 221200943695867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221201212131292 and 221201212131301.

It is not an unprimeable number, because it can be changed into a prime (221201212151323) 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, 45486683 + ... + 50114276.

It is an arithmetic number, because the mean of its divisors is an integer number (55300327511520).

Almost surely, 2^{221201212131323} is an apocalyptic number.

221201212131323 is a deficient number, since it is larger than the sum of its proper divisors (97914757).

221201212131323 is an equidigital number, since it uses as much as digits as its factorization.

221201212131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97914756.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 221201212131323 its reverse (323131212102122), we get a palindrome (544332424233445).

The spelling of 221201212131323 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred twelve million, one hundred thirty-one thousand, three hundred twenty-three".