211211101101986 has 8 divisors (see below), whose sum is σ = 316819747777260. Its totient is φ = 105604518509568.

The previous prime is 211211101101941. The next prime is 211211101101989. The reversal of 211211101101986 is 689101101112112.

It can be written as a sum of positive squares in 2 ways, for example, as 203241947127025 + 7969153974961 = 14256295^2 + 2822969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211211101101986² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211101101989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515764871 + ... + 516174218.

Almost surely, 2^{211211101101986} is an apocalyptic number.

211211101101986 is a deficient number, since it is larger than the sum of its proper divisors (105608646675274).

211211101101986 is a wasteful number, since it uses less digits than its factorization.

211211101101986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032041428.

The product of its (nonzero) digits is 1728, while the sum is 35.

The spelling of 211211101101986 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred one million, one hundred one thousand, nine hundred eighty-six".