21211002021112 has 16 divisors (see below), whose sum is σ = 40521018012840. Its totient is φ = 10405397217696.

The previous prime is 21211002021103. The next prime is 21211002021133. The reversal of 21211002021112 is 21112020011212.

It is a congruent number.

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, 25012973658 + ... + 25012974505.

Almost surely, 2^{21211002021112} is an apocalyptic number.

It is an amenable number.

21211002021112 is a deficient number, since it is larger than the sum of its proper divisors (19310015991728).

21211002021112 is a wasteful number, since it uses less digits than its factorization.

21211002021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50025948222 (or 50025948218 counting only the distinct ones).

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

Adding to 21211002021112 its reverse (21112020011212), we get a palindrome (42323022032324).

The spelling of 21211002021112 in words is "twenty-one trillion, two hundred eleven billion, two million, twenty-one thousand, one hundred twelve".