12101202121 has 2 divisors, whose sum is σ = 12101202122. Its totient is φ = 12101202120.

The previous prime is 12101202101. The next prime is 12101202131. The reversal of 12101202121 is 12120210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11518655625 + 582546496 = 107325^2 + 24136^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101202121 - 2¹⁷ = 12101071049 is a prime.

It is not a weakly prime, because it can be changed into another prime (12101202101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050601060 + 6050601061.

It is an arithmetic number, because the mean of its divisors is an integer number (6050601061).

Almost surely, 2^12101202121 is an apocalyptic number.

It is an amenable number.

12101202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101202121 is an equidigital number, since it uses as much as digits as its factorization.

12101202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12101202121 its reverse (12120210121), we get a palindrome (24221412242).

The spelling of 12101202121 in words is "twelve billion, one hundred one million, two hundred two thousand, one hundred twenty-one".