212021185969 has 2 divisors, whose sum is σ = 212021185970. Its totient is φ = 212021185968.

The previous prime is 212021185919. The next prime is 212021185993. The reversal of 212021185969 is 969581120212.

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., 109502751744 + 102518434225 = 330912^2 + 320185^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021185969 - 2¹¹ = 212021183921 is a prime.

It is a super-2 number, since 2×212021185969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021185919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010592984 + 106010592985.

It is an arithmetic number, because the mean of its divisors is an integer number (106010592985).

Almost surely, 2^212021185969 is an apocalyptic number.

It is an amenable number.

212021185969 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021185969 is an equidigital number, since it uses as much as digits as its factorization.

212021185969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 212021185969 in words is "two hundred twelve billion, twenty-one million, one hundred eighty-five thousand, nine hundred sixty-nine".