2122113421 has 4 divisors (see below), whose sum is σ = 2123190972. Its totient is φ = 2121035872.

The previous prime is 2122113397. The next prime is 2122113443. The reversal of 2122113421 is 1243112212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 662032900 + 1460080521 = 25730^2 + 38211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122113421 - 2¹¹ = 2122111373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122153421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535816 + ... + 539761.

It is an arithmetic number, because the mean of its divisors is an integer number (530797743).

Almost surely, 2^2122113421 is an apocalyptic number.

It is an amenable number.

2122113421 is a deficient number, since it is larger than the sum of its proper divisors (1077551).

2122113421 is a wasteful number, since it uses less digits than its factorization.

2122113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077550.

The product of its digits is 192, while the sum is 19.

The square root of 2122113421 is about 46066.4023014604. The cubic root of 2122113421 is about 1285.0583976246.

Adding to 2122113421 its reverse (1243112212), we get a palindrome (3365225633).

The spelling of 2122113421 in words is "two billion, one hundred twenty-two million, one hundred thirteen thousand, four hundred twenty-one".