211210211122061 has 2 divisors, whose sum is σ = 211210211122062. Its totient is φ = 211210211122060.

The previous prime is 211210211122039. The next prime is 211210211122069. The reversal of 211210211122061 is 160221112012112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211019027932036 + 191183190025 = 14526494^2 + 437245^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210211122061 - 2²² = 211210206927757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211210211122069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605105561030 + 105605105561031.

It is an arithmetic number, because the mean of its divisors is an integer number (105605105561031).

Almost surely, 2^{211210211122061} is an apocalyptic number.

It is an amenable number.

211210211122061 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210211122061 is an equidigital number, since it uses as much as digits as its factorization.

211210211122061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 211210211122061 its reverse (160221112012112), we get a palindrome (371431323134173).

The spelling of 211210211122061 in words is "two hundred eleven trillion, two hundred ten billion, two hundred eleven million, one hundred twenty-two thousand, sixty-one".