213121213322987 has 2 divisors, whose sum is σ = 213121213322988. Its totient is φ = 213121213322986.

The previous prime is 213121213322957. The next prime is 213121213323013. The reversal of 213121213322987 is 789223312121312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213121213322987 - 2¹⁰ = 213121213321963 is a prime.

It is not a weakly prime, because it can be changed into another prime (213121213322917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560606661493 + 106560606661494.

It is an arithmetic number, because the mean of its divisors is an integer number (106560606661494).

Almost surely, 2^{213121213322987} is an apocalyptic number.

213121213322987 is a deficient number, since it is larger than the sum of its proper divisors (1).

213121213322987 is an equidigital number, since it uses as much as digits as its factorization.

213121213322987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 213121213322987 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred twenty-two thousand, nine hundred eighty-seven".