21013121202 has 16 divisors (see below), whose sum is σ = 42284074080. Its totient is φ = 6961401792.

The previous prime is 21013121161. The next prime is 21013121219. The reversal of 21013121202 is 20212131012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10741927 + ... + 10743882.

It is an arithmetic number, because the mean of its divisors is an integer number (2642754630).

Almost surely, 2^21013121202 is an apocalyptic number.

21013121202 is an abundant number, since it is smaller than the sum of its proper divisors (21270952878).

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

21013121202 is a wasteful number, since it uses less digits than its factorization.

21013121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21485977.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21013121202 its reverse (20212131012), we get a palindrome (41225252214).

The spelling of 21013121202 in words is "twenty-one billion, thirteen million, one hundred twenty-one thousand, two hundred two".