2121442211421 has 12 divisors (see below), whose sum is σ = 3300021217948. Its totient is φ = 1305502899264.

The previous prime is 2121442211419. The next prime is 2121442211453. The reversal of 2121442211421 is 1241122441212.

2121442211421 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 442 + 211 + 4 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 602913425625 + 1518528785796 = 776475^2 + 1232286^2 .

It is not a de Polignac number, because 2121442211421 - 2¹ = 2121442211419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121442211621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9065992240 + ... + 9065992473.

Almost surely, 2^{2121442211421} is an apocalyptic number.

It is an amenable number.

2121442211421 is a deficient number, since it is larger than the sum of its proper divisors (1178579006527).

2121442211421 is a wasteful number, since it uses less digits than its factorization.

2121442211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18131984732 (or 18131984729 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

Adding to 2121442211421 its reverse (1241122441212), we get a palindrome (3362564652633).

The spelling of 2121442211421 in words is "two trillion, one hundred twenty-one billion, four hundred forty-two million, two hundred eleven thousand, four hundred twenty-one".