211211001887 has 2 divisors, whose sum is σ = 211211001888. Its totient is φ = 211211001886.

The previous prime is 211211001821. The next prime is 211211002031. The reversal of 211211001887 is 788100112112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211211001887 - 2²⁸ = 210942566431 is a prime.

It is a super-2 number, since 2×211211001887² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211211001187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605500943 + 105605500944.

It is an arithmetic number, because the mean of its divisors is an integer number (105605500944).

Almost surely, 2^211211001887 is an apocalyptic number.

211211001887 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211001887 is an equidigital number, since it uses as much as digits as its factorization.

211211001887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 32.

Adding to 211211001887 its reverse (788100112112), we get a palindrome (999311113999).

The spelling of 211211001887 in words is "two hundred eleven billion, two hundred eleven million, one thousand, eight hundred eighty-seven".