21112011201 has 16 divisors (see below), whose sum is σ = 28473422400. Its totient is φ = 13912723968.

The previous prime is 21112011191. The next prime is 21112011287. The reversal of 21112011201 is 10211021112.

It is not a de Polignac number, because 21112011201 - 2⁷ = 21112011073 is a prime.

It is a super-2 number, since 2×21112011201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112011601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1234930 + ... + 1251908.

It is an arithmetic number, because the mean of its divisors is an integer number (1779588900).

Almost surely, 2^21112011201 is an apocalyptic number.

It is an amenable number.

21112011201 is a deficient number, since it is larger than the sum of its proper divisors (7361411199).

21112011201 is a wasteful number, since it uses less digits than its factorization.

21112011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21112011201 its reverse (10211021112), we get a palindrome (31323032313).

The spelling of 21112011201 in words is "twenty-one billion, one hundred twelve million, eleven thousand, two hundred one".