21131222301 has 32 divisors (see below), whose sum is σ = 35894369280. Its totient is φ = 12035618928.

The previous prime is 21131222293. The next prime is 21131222311. The reversal of 21131222301 is 10322213112.

It is not a de Polignac number, because 21131222301 - 2³ = 21131222293 is a prime.

It is a super-3 number, since 3×21131222301³ (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 (21131222311) 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 31 ways as a sum of consecutive naturals, for example, 124071 + ... + 240116.

It is an arithmetic number, because the mean of its divisors is an integer number (1121699040).

Almost surely, 2^21131222301 is an apocalyptic number.

21131222301 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21131222301 is a deficient number, since it is larger than the sum of its proper divisors (14763146979).

21131222301 is a wasteful number, since it uses less digits than its factorization.

21131222301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364510 (or 364504 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21131222301 its reverse (10322213112), we get a palindrome (31453435413).

The spelling of 21131222301 in words is "twenty-one billion, one hundred thirty-one million, two hundred twenty-two thousand, three hundred one".