213939121272889 has 2 divisors, whose sum is σ = 213939121272890. Its totient is φ = 213939121272888.

The previous prime is 213939121272847. The next prime is 213939121272913. The reversal of 213939121272889 is 988272121939312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159956524401664 + 53982596871225 = 12647392^2 + 7347285^2 .

It is a cyclic number.

It is not a de Polignac number, because 213939121272889 - 2⁹ = 213939121272377 is a prime.

It is a super-2 number, since 2×213939121272889² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213939121272829) 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 as a sum of consecutive naturals, namely, 106969560636444 + 106969560636445.

It is an arithmetic number, because the mean of its divisors is an integer number (106969560636445).

Almost surely, 2^{213939121272889} is an apocalyptic number.

It is an amenable number.

213939121272889 is a deficient number, since it is larger than the sum of its proper divisors (1).

213939121272889 is an equidigital number, since it uses as much as digits as its factorization.

213939121272889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 67.

The spelling of 213939121272889 in words is "two hundred thirteen trillion, nine hundred thirty-nine billion, one hundred twenty-one million, two hundred seventy-two thousand, eight hundred eighty-nine".