21211012112 has 10 divisors (see below), whose sum is σ = 41096335998. Its totient is φ = 10605506048.

The previous prime is 21211012099. The next prime is 21211012117. The reversal of 21211012112 is 21121011212.

It can be written as a sum of positive squares in only one way, i.e., 21078393856 + 132618256 = 145184^2 + 11516^2 .

It is not an unprimeable number, because it can be changed into a prime (21211012117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662844113 + ... + 662844144.

Almost surely, 2^21211012112 is an apocalyptic number.

It is an amenable number.

21211012112 is a deficient number, since it is larger than the sum of its proper divisors (19885323886).

21211012112 is a wasteful number, since it uses less digits than its factorization.

21211012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325688265 (or 1325688259 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211012112 its reverse (21121011212), we get a palindrome (42332023324).

The spelling of 21211012112 in words is "twenty-one billion, two hundred eleven million, twelve thousand, one hundred twelve".