21027101202 has 160 divisors (see below), whose sum is σ = 50984017920. Its totient is φ = 6453457920.

The previous prime is 21027101189. The next prime is 21027101231. The reversal of 21027101202 is 20210172012.

It is a happy number.

21027101202 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 27630502 + ... + 27631262.

It is an arithmetic number, because the mean of its divisors is an integer number (318650112).

Almost surely, 2^21027101202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21027101202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25492008960).

21027101202 is an abundant number, since it is smaller than the sum of its proper divisors (29956916718).

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

21027101202 is a wasteful number, since it uses less digits than its factorization.

21027101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

Adding to 21027101202 its reverse (20210172012), we get a palindrome (41237273214).

The spelling of 21027101202 in words is "twenty-one billion, twenty-seven million, one hundred one thousand, two hundred two".