1121020122421 has 2 divisors, whose sum is σ = 1121020122422. Its totient is φ = 1121020122420.

The previous prime is 1121020122407. The next prime is 1121020122437. The reversal of 1121020122421 is 1242210201211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1057873960900 + 63146161521 = 1028530^2 + 251289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121020122421 - 2¹⁵ = 1121020089653 is a prime.

It is a super-2 number, since 2×1121020122421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121020122451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510061210 + 560510061211.

It is an arithmetic number, because the mean of its divisors is an integer number (560510061211).

Almost surely, 2^{1121020122421} is an apocalyptic number.

It is an amenable number.

1121020122421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121020122421 is an equidigital number, since it uses as much as digits as its factorization.

1121020122421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1121020122421 its reverse (1242210201211), we get a palindrome (2363230323632).

The spelling of 1121020122421 in words is "one trillion, one hundred twenty-one billion, twenty million, one hundred twenty-two thousand, four hundred twenty-one".