21121012112 has 10 divisors (see below), whose sum is σ = 40921960998. Its totient is φ = 10560506048.

The previous prime is 21121012103. The next prime is 21121012189.

21121012112 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 20305110016 + 815902096 = 142496^2 + 28564^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660031613 + ... + 660031644.

Almost surely, 2^21121012112 is an apocalyptic number.

It is an amenable number.

21121012112 is a deficient number, since it is larger than the sum of its proper divisors (19800948886).

21121012112 is a wasteful number, since it uses less digits than its factorization.

21121012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320063265 (or 1320063259 counting only the distinct ones).

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

It can be divided in two parts, 211210 and 12112, that added together give a palindrome (223322).

The spelling of 21121012112 in words is "twenty-one billion, one hundred twenty-one million, twelve thousand, one hundred twelve".