21301131112 has 16 divisors (see below), whose sum is σ = 39967130340. Its totient is φ = 10643229696.

The previous prime is 21301131079. The next prime is 21301131157. The reversal of 21301131112 is 21113110312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15493776676 + 5807354436 = 124474^2 + 76206^2 .

It is a super-2 number, since 2×21301131112² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904633 + ... + 927880.

Almost surely, 2^21301131112 is an apocalyptic number.

It is an amenable number.

21301131112 is a deficient number, since it is larger than the sum of its proper divisors (18665999228).

21301131112 is a wasteful number, since it uses less digits than its factorization.

21301131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833972 (or 1833968 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21301131112 its reverse (21113110312), we get a palindrome (42414241424).

The spelling of 21301131112 in words is "twenty-one billion, three hundred one million, one hundred thirty-one thousand, one hundred twelve".