210120001221101 has 2 divisors, whose sum is σ = 210120001221102. Its totient is φ = 210120001221100.

The previous prime is 210120001221061. The next prime is 210120001221113. The reversal of 210120001221101 is 101122100021012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201618700562500 + 8501300658601 = 14199250^2 + 2915699^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120001221101 - 2³⁰ = 210118927479277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210120001221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060000610550 + 105060000610551.

It is an arithmetic number, because the mean of its divisors is an integer number (105060000610551).

Almost surely, 2^{210120001221101} is an apocalyptic number.

It is an amenable number.

210120001221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120001221101 is an equidigital number, since it uses as much as digits as its factorization.

210120001221101 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 14.

Adding to 210120001221101 its reverse (101122100021012), we get a palindrome (311242101242113).

The spelling of 210120001221101 in words is "two hundred ten trillion, one hundred twenty billion, one million, two hundred twenty-one thousand, one hundred one".