211101061660631 has 2 divisors, whose sum is σ = 211101061660632. Its totient is φ = 211101061660630.

The previous prime is 211101061660589. The next prime is 211101061660691. The reversal of 211101061660631 is 136066160101112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211101061660631 is a prime.

It is a super-2 number, since 2×211101061660631² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211101061660591 and 211101061660600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211101061660691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550530830315 + 105550530830316.

It is an arithmetic number, because the mean of its divisors is an integer number (105550530830316).

Almost surely, 2^{211101061660631} is an apocalyptic number.

211101061660631 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101061660631 is an equidigital number, since it uses as much as digits as its factorization.

211101061660631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 211101061660631 in words is "two hundred eleven trillion, one hundred one billion, sixty-one million, six hundred sixty thousand, six hundred thirty-one".