21020110122012 has 96 divisors (see below), whose sum is σ = 51898825574400. Its totient is φ = 6610848307200.

The previous prime is 21020110122007. The next prime is 21020110122029. The reversal of 21020110122012 is 21022101102012.

It is a super-2 number, since 2×21020110122012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020110121982 and 21020110122000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22247439 + ... + 23173017.

It is an arithmetic number, because the mean of its divisors is an integer number (540612766400).

Almost surely, 2^{21020110122012} is an apocalyptic number.

It is an amenable number.

21020110122012 is an abundant number, since it is smaller than the sum of its proper divisors (30878715452388).

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

21020110122012 is a wasteful number, since it uses less digits than its factorization.

21020110122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927147 (or 927145 counting only the distinct ones).

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

Adding to 21020110122012 its reverse (21022101102012), we get a palindrome (42042211224024).

The spelling of 21020110122012 in words is "twenty-one trillion, twenty billion, one hundred ten million, one hundred twenty-two thousand, twelve".