120020121111221 has 2 divisors, whose sum is σ = 120020121111222. Its totient is φ = 120020121111220.

The previous prime is 120020121111193. The next prime is 120020121111239. The reversal of 120020121111221 is 122111121020021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118910606488996 + 1109514622225 = 10904614^2 + 1053335^2 .

It is a cyclic number.

It is not a de Polignac number, because 120020121111221 - 2²⁶ = 120020054002357 is a prime.

It is a super-2 number, since 2×120020121111221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120020121111221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120020121111251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010060555610 + 60010060555611.

It is an arithmetic number, because the mean of its divisors is an integer number (60010060555611).

Almost surely, 2^{120020121111221} is an apocalyptic number.

It is an amenable number.

120020121111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120020121111221 is an equidigital number, since it uses as much as digits as its factorization.

120020121111221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 120020121111221 its reverse (122111121020021), we get a palindrome (242131242131242).

The spelling of 120020121111221 in words is "one hundred twenty trillion, twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".