100121220121229 has 2 divisors, whose sum is σ = 100121220121230. Its totient is φ = 100121220121228.

The previous prime is 100121220121199. The next prime is 100121220121277. The reversal of 100121220121229 is 922121022121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99868583204329 + 252636916900 = 9993427^2 + 502630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121220121229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121220121198 and 100121220121207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121220121729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060610060614 + 50060610060615.

It is an arithmetic number, because the mean of its divisors is an integer number (50060610060615).

Almost surely, 2^{100121220121229} is an apocalyptic number.

It is an amenable number.

100121220121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121220121229 is an equidigital number, since it uses as much as digits as its factorization.

100121220121229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 100121220121229 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-nine".