121001012202221 has 2 divisors, whose sum is σ = 121001012202222. Its totient is φ = 121001012202220.

The previous prime is 121001012202143. The next prime is 121001012202233. The reversal of 121001012202221 is 122202210100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120318719682121 + 682292520100 = 10968989^2 + 826010^2 .

It is an emirp because it is prime and its reverse (122202210100121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121001012202221 - 2¹⁸ = 121001011940077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121001012202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001012202251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500506101110 + 60500506101111.

It is an arithmetic number, because the mean of its divisors is an integer number (60500506101111).

Almost surely, 2^{121001012202221} is an apocalyptic number.

It is an amenable number.

121001012202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001012202221 is an equidigital number, since it uses as much as digits as its factorization.

121001012202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121001012202221 its reverse (122202210100121), we get a palindrome (243203222302342).

The spelling of 121001012202221 in words is "one hundred twenty-one trillion, one billion, twelve million, two hundred two thousand, two hundred twenty-one".