212220100987 has 2 divisors, whose sum is σ = 212220100988. Its totient is φ = 212220100986.

The previous prime is 212220100973. The next prime is 212220101011. The reversal of 212220100987 is 789001022212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212220100987 is a prime.

It is not a weakly prime, because it can be changed into another prime (212220100957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110050493 + 106110050494.

It is an arithmetic number, because the mean of its divisors is an integer number (106110050494).

Almost surely, 2^212220100987 is an apocalyptic number.

212220100987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220100987 is an equidigital number, since it uses as much as digits as its factorization.

212220100987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 212220100987 in words is "two hundred twelve billion, two hundred twenty million, one hundred thousand, nine hundred eighty-seven".