21020011002012 has 192 divisors, whose sum is σ = 54634880982528. Its totient is φ = 6236979840000.

The previous prime is 21020011001921. The next prime is 21020011002059.

21020011002012 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 511701618 + ... + 511742694.

It is an arithmetic number, because the mean of its divisors is an integer number (284556671784).

Almost surely, 2^{21020011002012} is an apocalyptic number.

21020011002012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21020011002012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27317440491264).

21020011002012 is an abundant number, since it is smaller than the sum of its proper divisors (33614869980516).

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

21020011002012 is a wasteful number, since it uses less digits than its factorization.

21020011002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41620 (or 41618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

It can be divided in two parts, 2102001 and 1002012, that added together give a palindrome (3104013).

The spelling of 21020011002012 in words is "twenty-one trillion, twenty billion, eleven million, two thousand, twelve".