10201120001221 has 2 divisors, whose sum is σ = 10201120001222. Its totient is φ = 10201120001220.

The previous prime is 10201120001213. The next prime is 10201120001239. The reversal of 10201120001221 is 12210002110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5316533789121 + 4884586212100 = 2305761^2 + 2210110^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201120001221 - 2³ = 10201120001213 is a prime.

It is a super-2 number, since 2×10201120001221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10201120001521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100560000610 + 5100560000611.

It is an arithmetic number, because the mean of its divisors is an integer number (5100560000611).

Almost surely, 2^{10201120001221} is an apocalyptic number.

It is an amenable number.

10201120001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201120001221 is an equidigital number, since it uses as much as digits as its factorization.

10201120001221 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 13.

Adding to 10201120001221 its reverse (12210002110201), we get a palindrome (22411122111422).

The spelling of 10201120001221 in words is "ten trillion, two hundred one billion, one hundred twenty million, one thousand, two hundred twenty-one".