21201021011112 has 32 divisors (see below), whose sum is σ = 53159830152000. Its totient is φ = 7046036653824.

The previous prime is 21201021011059. The next prime is 21201021011123. The reversal of 21201021011112 is 21111012010212.

It is a happy number.

It is a super-2 number, since 2×21201021011112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21201021011091 and 21201021011100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310638612 + ... + 1310654787.

It is an arithmetic number, because the mean of its divisors is an integer number (1661244692250).

Almost surely, 2^{21201021011112} is an apocalyptic number.

It is an amenable number.

21201021011112 is an abundant number, since it is smaller than the sum of its proper divisors (31958809140888).

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

21201021011112 is a wasteful number, since it uses less digits than its factorization.

21201021011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621293745 (or 2621293741 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21201021011112 its reverse (21111012010212), we get a palindrome (42312033021324).

The spelling of 21201021011112 in words is "twenty-one trillion, two hundred one billion, twenty-one million, eleven thousand, one hundred twelve".