211316430010505 has 16 divisors (see below), whose sum is σ = 253677547278480. Its totient is φ = 168987935619072.

The previous prime is 211316430010501. The next prime is 211316430010519. The reversal of 211316430010505 is 505010034613112.

It can be written as a sum of positive squares in 8 ways, for example, as 98284937343376 + 113031492667129 = 9913876^2 + 10631627^2 .

It is a cyclic number.

It is not a de Polignac number, because 211316430010505 - 2² = 211316430010501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211316430010501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135886517 + ... + 137432813.

It is an arithmetic number, because the mean of its divisors is an integer number (15854846704905).

Almost surely, 2^{211316430010505} is an apocalyptic number.

It is an amenable number.

211316430010505 is a deficient number, since it is larger than the sum of its proper divisors (42361117267975).

211316430010505 is a wasteful number, since it uses less digits than its factorization.

211316430010505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556828.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 211316430010505 its reverse (505010034613112), we get a palindrome (716326464623617).

The spelling of 211316430010505 in words is "two hundred eleven trillion, three hundred sixteen billion, four hundred thirty million, ten thousand, five hundred five".