211711562551261 has 8 divisors (see below), whose sum is σ = 220963789664640. Its totient is φ = 202463283485232.

The previous prime is 211711562551213. The next prime is 211711562551309. The reversal of 211711562551261 is 162155265117112.

It is an interprime number because it is at equal distance from previous prime (211711562551213) and next prime (211711562551309).

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

It is a cyclic number.

It is not a de Polignac number, because 211711562551261 - 2²⁷ = 211711428333533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211711562581261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986902246 + ... + 987116743.

It is an arithmetic number, because the mean of its divisors is an integer number (27620473708080).

Almost surely, 2^{211711562551261} is an apocalyptic number.

It is an amenable number.

211711562551261 is a deficient number, since it is larger than the sum of its proper divisors (9252227113379).

211711562551261 is a wasteful number, since it uses less digits than its factorization.

211711562551261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974023675.

The product of its digits is 252000, while the sum is 46.

The spelling of 211711562551261 in words is "two hundred eleven trillion, seven hundred eleven billion, five hundred sixty-two million, five hundred fifty-one thousand, two hundred sixty-one".