21226230471 has 16 divisors (see below), whose sum is σ = 28606869504. Its totient is φ = 13998849984.

The previous prime is 21226230463. The next prime is 21226230479. The reversal of 21226230471 is 17403262212.

It is an interprime number because it is at equal distance from previous prime (21226230463) and next prime (21226230479).

It is not a de Polignac number, because 21226230471 - 2³ = 21226230463 is a prime.

It is a super-3 number, since 3×21226230471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226230479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51931 + ... + 212483.

It is an arithmetic number, because the mean of its divisors is an integer number (1787929344).

Almost surely, 2^21226230471 is an apocalyptic number.

21226230471 is a deficient number, since it is larger than the sum of its proper divisors (7380639033).

21226230471 is a wasteful number, since it uses less digits than its factorization.

21226230471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161030.

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 21226230471 its reverse (17403262212), we get a palindrome (38629492683).

The spelling of 21226230471 in words is "twenty-one billion, two hundred twenty-six million, two hundred thirty thousand, four hundred seventy-one".