213939121272829 has 2 divisors, whose sum is σ = 213939121272830. Its totient is φ = 213939121272828.

The previous prime is 213939121272739. The next prime is 213939121272847. The reversal of 213939121272829 is 928272121939312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136343688156900 + 77595433115929 = 11676630^2 + 8808827^2 .

It is a cyclic number.

It is not a de Polignac number, because 213939121272829 - 2³¹ = 213936973789181 is a prime.

It is a super-2 number, since 2×213939121272829² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213939121272889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106969560636414 + 106969560636415.

It is an arithmetic number, because the mean of its divisors is an integer number (106969560636415).

Almost surely, 2^{213939121272829} is an apocalyptic number.

It is an amenable number.

213939121272829 is a deficient number, since it is larger than the sum of its proper divisors (1).

213939121272829 is an equidigital number, since it uses as much as digits as its factorization.

213939121272829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The spelling of 213939121272829 in words is "two hundred thirteen trillion, nine hundred thirty-nine billion, one hundred twenty-one million, two hundred seventy-two thousand, eight hundred twenty-nine".