213112021069 has 2 divisors, whose sum is σ = 213112021070. Its totient is φ = 213112021068.

The previous prime is 213112020997. The next prime is 213112021117. The reversal of 213112021069 is 960120211312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188951049225 + 24160971844 = 434685^2 + 155438^2 .

It is a cyclic number.

It is not a de Polignac number, because 213112021069 - 2¹³ = 213112012877 is a prime.

It is a super-2 number, since 2×213112021069² (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 (213112021669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556010534 + 106556010535.

It is an arithmetic number, because the mean of its divisors is an integer number (106556010535).

Almost surely, 2^213112021069 is an apocalyptic number.

It is an amenable number.

213112021069 is a deficient number, since it is larger than the sum of its proper divisors (1).

213112021069 is an equidigital number, since it uses as much as digits as its factorization.

213112021069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 213112021069 in words is "two hundred thirteen billion, one hundred twelve million, twenty-one thousand, sixty-nine".