21030221212302 has 64 divisors (see below), whose sum is σ = 43125436569600. Its totient is φ = 6833240041824.

The previous prime is 21030221212271. The next prime is 21030221212309. The reversal of 21030221212302 is 20321212203012.

It is a super-2 number, since 2×21030221212302² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030221212309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524437449 + ... + 524477547.

It is an arithmetic number, because the mean of its divisors is an integer number (673834946400).

Almost surely, 2^{21030221212302} is an apocalyptic number.

21030221212302 is an abundant number, since it is smaller than the sum of its proper divisors (22095215357298).

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

21030221212302 is a wasteful number, since it uses less digits than its factorization.

21030221212302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44197.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21030221212302 its reverse (20321212203012), we get a palindrome (41351433415314).

The spelling of 21030221212302 in words is "twenty-one trillion, thirty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred two".