21020202011112 has 64 divisors (see below), whose sum is σ = 53884661607360. Its totient is φ = 6830879462400.

The previous prime is 21020202011101. The next prime is 21020202011113. The reversal of 21020202011112 is 21111020202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020202011091 and 21020202011100.

It is not an unprimeable number, because it can be changed into a prime (21020202011113) 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, 63365814 + ... + 63696677.

It is an arithmetic number, because the mean of its divisors is an integer number (841947837615).

Almost surely, 2^{21020202011112} is an apocalyptic number.

It is an amenable number.

21020202011112 is an abundant number, since it is smaller than the sum of its proper divisors (32864459596248).

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

21020202011112 is a wasteful number, since it uses less digits than its factorization.

21020202011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127062674 (or 127062670 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21020202011112 its reverse (21111020202012), we get a palindrome (42131222213124).

The spelling of 21020202011112 in words is "twenty-one trillion, twenty billion, two hundred two million, eleven thousand, one hundred twelve".