210210121022101 has 4 divisors (see below), whose sum is σ = 210245986941804. Its totient is φ = 210174255102400.

The previous prime is 210210121022087. The next prime is 210210121022117. The reversal of 210210121022101 is 101220121012012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111888816218001 + 98321304804100 = 10577751^2 + 9915710^2 .

It is a cyclic number.

It is not a de Polignac number, because 210210121022101 - 2²⁵ = 210210087467669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210210121022141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17932951060 + ... + 17932962781.

It is an arithmetic number, because the mean of its divisors is an integer number (52561496735451).

Almost surely, 2^{210210121022101} is an apocalyptic number.

It is an amenable number.

210210121022101 is a deficient number, since it is larger than the sum of its proper divisors (35865919703).

210210121022101 is an equidigital number, since it uses as much as digits as its factorization.

210210121022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35865919702.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210210121022101 its reverse (101220121012012), we get a palindrome (311430242034113).

The spelling of 210210121022101 in words is "two hundred ten trillion, two hundred ten billion, one hundred twenty-one million, twenty-two thousand, one hundred one".