121244430221 has 2 divisors, whose sum is σ = 121244430222. Its totient is φ = 121244430220.

The previous prime is 121244430211. The next prime is 121244430233. The reversal of 121244430221 is 122034442121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119629515625 + 1614914596 = 345875^2 + 40186^2 .

It is a cyclic number.

It is not a de Polignac number, because 121244430221 - 2¹⁸ = 121244168077 is a prime.

It is a super-2 number, since 2×121244430221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121244430211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60622215110 + 60622215111.

It is an arithmetic number, because the mean of its divisors is an integer number (60622215111).

Almost surely, 2^121244430221 is an apocalyptic number.

It is an amenable number.

121244430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121244430221 is an equidigital number, since it uses as much as digits as its factorization.

121244430221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 121244430221 its reverse (122034442121), we get a palindrome (243278872342).

The spelling of 121244430221 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred thirty thousand, two hundred twenty-one".