21142022231 has 8 divisors (see below), whose sum is σ = 23388870528. Its totient is φ = 18949315000.

The previous prime is 21142022219. The next prime is 21142022281. The reversal of 21142022231 is 13222024112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21142022231 - 2¹⁴ = 21142005847 is a prime.

It is a super-2 number, since 2×21142022231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142022281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13534445 + ... + 13536006.

It is an arithmetic number, because the mean of its divisors is an integer number (2923608816).

Almost surely, 2^21142022231 is an apocalyptic number.

21142022231 is a deficient number, since it is larger than the sum of its proper divisors (2246848297).

21142022231 is a wasteful number, since it uses less digits than its factorization.

21142022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27070533.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21142022231 its reverse (13222024112), we get a palindrome (34364046343).

The spelling of 21142022231 in words is "twenty-one billion, one hundred forty-two million, twenty-two thousand, two hundred thirty-one".