21120201210112 has 18 divisors (see below), whose sum is σ = 42157901634758. Its totient is φ = 10560100604928.

The previous prime is 21120201210107. The next prime is 21120201210133. The reversal of 21120201210112 is 21101210202112.

It can be written as a sum of positive squares in only one way, i.e., 20349626235136 + 770574974976 = 4511056^2 + 877824^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41250392733 + ... + 41250393244.

Almost surely, 2^{21120201210112} is an apocalyptic number.

It is an amenable number.

21120201210112 is a deficient number, since it is larger than the sum of its proper divisors (21037700424646).

21120201210112 is an frugal number, since it uses more digits than its factorization.

21120201210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82500785993 (or 82500785979 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120201210112 its reverse (21101210202112), we get a palindrome (42221411412224).

The spelling of 21120201210112 in words is "twenty-one trillion, one hundred twenty billion, two hundred one million, two hundred ten thousand, one hundred twelve".