21220505202 has 32 divisors (see below), whose sum is σ = 46012478400. Its totient is φ = 6485561280.

The previous prime is 21220505147. The next prime is 21220505219. The reversal of 21220505202 is 20250502212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901324 + ... + 924567.

It is an arithmetic number, because the mean of its divisors is an integer number (1437889950).

Almost surely, 2^21220505202 is an apocalyptic number.

21220505202 is an abundant number, since it is smaller than the sum of its proper divisors (24791973198).

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

21220505202 is a wasteful number, since it uses less digits than its factorization.

21220505202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826058.

The product of its (nonzero) digits is 800, while the sum is 21.

The spelling of 21220505202 in words is "twenty-one billion, two hundred twenty million, five hundred five thousand, two hundred two".