21201011211112 has 16 divisors (see below), whose sum is σ = 42090242845860. Its totient is φ = 9976946452224.

The previous prime is 21201011211041. The next prime is 21201011211131. The reversal of 21201011211112 is 21111211010212.

It can be written as a sum of positive squares in 2 ways, for example, as 17503797532516 + 3697213678596 = 4183754^2 + 1922814^2 .

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, 77944894023 + ... + 77944894294.

Almost surely, 2^{21201011211112} is an apocalyptic number.

It is an amenable number.

21201011211112 is a deficient number, since it is larger than the sum of its proper divisors (20889231634748).

21201011211112 is a wasteful number, since it uses less digits than its factorization.

21201011211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155889788340 (or 155889788336 counting only the distinct ones).

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

Adding to 21201011211112 its reverse (21111211010212), we get a palindrome (42312222221324).

The spelling of 21201011211112 in words is "twenty-one trillion, two hundred one billion, eleven million, two hundred eleven thousand, one hundred twelve".