21422144131 has 4 divisors (see below), whose sum is σ = 21437458000. Its totient is φ = 21406830264.

The previous prime is 21422144113. The next prime is 21422144201. The reversal of 21422144131 is 13144122412.

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

It is a cyclic number.

It is not a de Polignac number, because 21422144131 - 2¹¹ = 21422142083 is a prime.

It is a super-2 number, since 2×21422144131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21422144096 and 21422144105.

It is not an unprimeable number, because it can be changed into a prime (21422144101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7654836 + ... + 7657633.

It is an arithmetic number, because the mean of its divisors is an integer number (5359364500).

Almost surely, 2^21422144131 is an apocalyptic number.

21422144131 is a deficient number, since it is larger than the sum of its proper divisors (15313869).

21422144131 is a wasteful number, since it uses less digits than its factorization.

21422144131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15313868.

The product of its digits is 1536, while the sum is 25.

Adding to 21422144131 its reverse (13144122412), we get a palindrome (34566266543).

The spelling of 21422144131 in words is "twenty-one billion, four hundred twenty-two million, one hundred forty-four thousand, one hundred thirty-one".