213234043109 has 2 divisors, whose sum is σ = 213234043110. Its totient is φ = 213234043108.

The previous prime is 213234043093. The next prime is 213234043123. The reversal of 213234043109 is 901340432312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120846616900 + 92387426209 = 347630^2 + 303953^2 .

It is a cyclic number.

It is not a de Polignac number, because 213234043109 - 2⁴ = 213234043093 is a prime.

It is a super-2 number, since 2×213234043109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213234043129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106617021554 + 106617021555.

It is an arithmetic number, because the mean of its divisors is an integer number (106617021555).

Almost surely, 2^213234043109 is an apocalyptic number.

It is an amenable number.

213234043109 is a deficient number, since it is larger than the sum of its proper divisors (1).

213234043109 is an equidigital number, since it uses as much as digits as its factorization.

213234043109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 213234043109 in words is "two hundred thirteen billion, two hundred thirty-four million, forty-three thousand, one hundred nine".