210121120212101 has 16 divisors (see below), whose sum is σ = 250580083024128. Its totient is φ = 172272626064000.

The previous prime is 210121120212067. The next prime is 210121120212109. The reversal of 210121120212101 is 101212021121012.

It is a de Polignac number, because none of the positive numbers 2^k-210121120212101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210121120212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121120212109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48432401 + ... + 52592201.

It is an arithmetic number, because the mean of its divisors is an integer number (15661255189008).

Almost surely, 2^{210121120212101} is an apocalyptic number.

It is an amenable number.

210121120212101 is a deficient number, since it is larger than the sum of its proper divisors (40458962812027).

210121120212101 is a wasteful number, since it uses less digits than its factorization.

210121120212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473572.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210121120212101 its reverse (101212021121012), we get a palindrome (311333141333113).

The spelling of 210121120212101 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twelve thousand, one hundred one".