101201210121221 has 16 divisors (see below), whose sum is σ = 118942973952000. Its totient is φ = 84300832688688.

The previous prime is 101201210121191. The next prime is 101201210121223. The reversal of 101201210121221 is 122121012102101.

It is not a de Polignac number, because 101201210121221 - 2¹⁸ = 101201209859077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101201210121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101201210121223) 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, 844705541 + ... + 844825338.

It is an arithmetic number, because the mean of its divisors is an integer number (7433935872000).

Almost surely, 2^{101201210121221} is an apocalyptic number.

It is an amenable number.

101201210121221 is a deficient number, since it is larger than the sum of its proper divisors (17741763830779).

101201210121221 is a wasteful number, since it uses less digits than its factorization.

101201210121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689531128.

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

Adding to 101201210121221 its reverse (122121012102101), we get a palindrome (223322222223322).

The spelling of 101201210121221 in words is "one hundred one trillion, two hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".