21021120101112 has 32 divisors (see below), whose sum is σ = 55644141445200. Its totient is φ = 6594861208064.

The previous prime is 21021120101081. The next prime is 21021120101131. The reversal of 21021120101112 is 21110102112012.

It is a happy number.

It is a super-2 number, since 2×21021120101112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021120101091 and 21021120101100.

It is a congruent number.

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, 25761176187 + ... + 25761177002.

Almost surely, 2^{21021120101112} is an apocalyptic number.

It is an amenable number.

21021120101112 is an abundant number, since it is smaller than the sum of its proper divisors (34623021344088).

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

21021120101112 is a wasteful number, since it uses less digits than its factorization.

21021120101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51522353215 (or 51522353211 counting only the distinct ones).

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

Adding to 21021120101112 its reverse (21110102112012), we get a palindrome (42131222213124).

The spelling of 21021120101112 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred one thousand, one hundred twelve".