21012201112 has 16 divisors (see below), whose sum is σ = 45026145360. Its totient is φ = 9005229024.

The previous prime is 21012201107. The next prime is 21012201113. The reversal of 21012201112 is 21110221012.

It is a super-3 number, since 3×21012201112³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21012201092 and 21012201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012201113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187608883 + ... + 187608994.

It is an arithmetic number, because the mean of its divisors is an integer number (2814134085).

Almost surely, 2^21012201112 is an apocalyptic number.

It is an amenable number.

21012201112 is an abundant number, since it is smaller than the sum of its proper divisors (24013944248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012201112 is a wasteful number, since it uses less digits than its factorization.

21012201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375217890 (or 375217886 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21012201112 its reverse (21110221012), we get a palindrome (42122422124).

The spelling of 21012201112 in words is "twenty-one billion, twelve million, two hundred one thousand, one hundred twelve".