212202115991 has 2 divisors, whose sum is σ = 212202115992. Its totient is φ = 212202115990.

The previous prime is 212202115967. The next prime is 212202116003. The reversal of 212202115991 is 199511202212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212202115991 - 2²² = 212197921687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212202115291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101057995 + 106101057996.

It is an arithmetic number, because the mean of its divisors is an integer number (106101057996).

Almost surely, 2^212202115991 is an apocalyptic number.

212202115991 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202115991 is an equidigital number, since it uses as much as digits as its factorization.

212202115991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 212202115991 in words is "two hundred twelve billion, two hundred two million, one hundred fifteen thousand, nine hundred ninety-one".