212113109987 has 2 divisors, whose sum is σ = 212113109988. Its totient is φ = 212113109986.

The previous prime is 212113109981. The next prime is 212113110047. The reversal of 212113109987 is 789901311212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212113109987 - 2²⁴ = 212096332771 is a prime.

It is not a weakly prime, because it can be changed into another prime (212113109981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056554993 + 106056554994.

It is an arithmetic number, because the mean of its divisors is an integer number (106056554994).

Almost surely, 2^212113109987 is an apocalyptic number.

212113109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212113109987 is an equidigital number, since it uses as much as digits as its factorization.

212113109987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 212113109987 in words is "two hundred twelve billion, one hundred thirteen million, one hundred nine thousand, nine hundred eighty-seven".