101221121001221 has 4 divisors (see below), whose sum is σ = 109007361078252. Its totient is φ = 93434880924192.

The previous prime is 101221121001199. The next prime is 101221121001233. The reversal of 101221121001221 is 122100121122101.

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 49598764084321 + 51622356916900 = 7042639^2 + 7184870^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221121001221 - 2⁶ = 101221121001157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221121001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221121001251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3893120038496 + ... + 3893120038521.

It is an arithmetic number, because the mean of its divisors is an integer number (27251840269563).

Almost surely, 2^{101221121001221} is an apocalyptic number.

It is an amenable number.

101221121001221 is a deficient number, since it is larger than the sum of its proper divisors (7786240077031).

101221121001221 is an equidigital number, since it uses as much as digits as its factorization.

101221121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7786240077030.

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

Adding to 101221121001221 its reverse (122100121122101), we get a palindrome (223321242123322).

The spelling of 101221121001221 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twenty-one million, one thousand, two hundred twenty-one".