213311209987 has 2 divisors, whose sum is σ = 213311209988. Its totient is φ = 213311209986.

The previous prime is 213311209967. The next prime is 213311210009. The reversal of 213311209987 is 789902113312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311209987 is a prime.

It is a super-2 number, since 2×213311209987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213311209967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106655604993 + 106655604994.

It is an arithmetic number, because the mean of its divisors is an integer number (106655604994).

Almost surely, 2^213311209987 is an apocalyptic number.

213311209987 is a deficient number, since it is larger than the sum of its proper divisors (1).

213311209987 is an equidigital number, since it uses as much as digits as its factorization.

213311209987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 213311209987 in words is "two hundred thirteen billion, three hundred eleven million, two hundred nine thousand, nine hundred eighty-seven".