2122141421 has 2 divisors, whose sum is σ = 2122141422. Its totient is φ = 2122141420.

The previous prime is 2122141403. The next prime is 2122141447. The reversal of 2122141421 is 1241412212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2120142025 + 1999396 = 46045^2 + 1414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122141421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122141393 and 2122141402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122147421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061070710 + 1061070711.

It is an arithmetic number, because the mean of its divisors is an integer number (1061070711).

Almost surely, 2^2122141421 is an apocalyptic number.

It is an amenable number.

2122141421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122141421 is an equidigital number, since it uses as much as digits as its factorization.

2122141421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 20.

The square root of 2122141421 is about 46066.7062095826. The cubic root of 2122141421 is about 1285.0640494553.

Adding to 2122141421 its reverse (1241412212), we get a palindrome (3363553633).

The spelling of 2122141421 in words is "two billion, one hundred twenty-two million, one hundred forty-one thousand, four hundred twenty-one".