21421122141 has 4 divisors (see below), whose sum is σ = 28561496192. Its totient is φ = 14280748092.

The previous prime is 21421122097. The next prime is 21421122143. The reversal of 21421122141 is 14122112412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21421122141 - 2¹¹ = 21421120093 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 (21421122143) 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, 3570187021 + ... + 3570187026.

It is an arithmetic number, because the mean of its divisors is an integer number (7140374048).

Almost surely, 2^21421122141 is an apocalyptic number.

It is an amenable number.

21421122141 is a deficient number, since it is larger than the sum of its proper divisors (7140374051).

21421122141 is an equidigital number, since it uses as much as digits as its factorization.

21421122141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140374050.

The product of its digits is 256, while the sum is 21.

Adding to 21421122141 its reverse (14122112412), we get a palindrome (35543234553).

The spelling of 21421122141 in words is "twenty-one billion, four hundred twenty-one million, one hundred twenty-two thousand, one hundred forty-one".