211212611461 has 4 divisors (see below), whose sum is σ = 211213532992. Its totient is φ = 211211689932.

The previous prime is 211212611459. The next prime is 211212611509. The reversal of 211212611461 is 164116212112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211212611461 - 2¹ = 211212611459 is a prime.

It is a super-2 number, since 2×211212611461² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212615461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180820 + ... + 674626.

It is an arithmetic number, because the mean of its divisors is an integer number (52803383248).

Almost surely, 2^211212611461 is an apocalyptic number.

It is an amenable number.

211212611461 is a deficient number, since it is larger than the sum of its proper divisors (921531).

211212611461 is an equidigital number, since it uses as much as digits as its factorization.

211212611461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921530.

The product of its digits is 1152, while the sum is 28.

Adding to 211212611461 its reverse (164116212112), we get a palindrome (375328823573).

The spelling of 211212611461 in words is "two hundred eleven billion, two hundred twelve million, six hundred eleven thousand, four hundred sixty-one".