211001209979 has 16 divisors (see below), whose sum is σ = 254250228480. Its totient is φ = 171059752800.

The previous prime is 211001209963. The next prime is 211001209981. The reversal of 211001209979 is 979902100112.

211001209979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211001209979 - 2⁴ = 211001209963 is a prime.

It is a super-2 number, since 2×211001209979² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211001209919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212497 + ... + 1375554.

It is an arithmetic number, because the mean of its divisors is an integer number (15890639280).

Almost surely, 2^211001209979 is an apocalyptic number.

211001209979 is a deficient number, since it is larger than the sum of its proper divisors (43249018501).

211001209979 is a wasteful number, since it uses less digits than its factorization.

211001209979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588690.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 211001209979 in words is "two hundred eleven billion, one million, two hundred nine thousand, nine hundred seventy-nine".