211012212232121 has 2 divisors, whose sum is σ = 211012212232122. Its totient is φ = 211012212232120.

The previous prime is 211012212232117. The next prime is 211012212232127. The reversal of 211012212232121 is 121232212210112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186251526760000 + 24760685472121 = 13647400^2 + 4976011^2 .

It is a cyclic number.

It is not a de Polignac number, because 211012212232121 - 2² = 211012212232117 is a prime.

It is a super-2 number, since 2×211012212232121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211012212232127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506106116060 + 105506106116061.

It is an arithmetic number, because the mean of its divisors is an integer number (105506106116061).

Almost surely, 2^{211012212232121} is an apocalyptic number.

It is an amenable number.

211012212232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012212232121 is an equidigital number, since it uses as much as digits as its factorization.

211012212232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 211012212232121 its reverse (121232212210112), we get a palindrome (332244424442233).

The spelling of 211012212232121 in words is "two hundred eleven trillion, twelve billion, two hundred twelve million, two hundred thirty-two thousand, one hundred twenty-one".