213330121231 has 16 divisors (see below), whose sum is σ = 217987822080. Its totient is φ = 208696793760.

The previous prime is 213330121229. The next prime is 213330121241. The reversal of 213330121231 is 132121033312.

It is a cyclic number.

It is not a de Polignac number, because 213330121231 - 2¹ = 213330121229 is a prime.

It is a super-2 number, since 2×213330121231² (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 (213330121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28054876 + ... + 28062478.

It is an arithmetic number, because the mean of its divisors is an integer number (13624238880).

Almost surely, 2^213330121231 is an apocalyptic number.

213330121231 is a deficient number, since it is larger than the sum of its proper divisors (4657700849).

213330121231 is an equidigital number, since it uses as much as digits as its factorization.

213330121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213330121231 its reverse (132121033312), we get a palindrome (345451154543).

The spelling of 213330121231 in words is "two hundred thirteen billion, three hundred thirty million, one hundred twenty-one thousand, two hundred thirty-one".