21221011302 has 16 divisors (see below), whose sum is σ = 43589104752. Its totient is φ = 6882490080.

The previous prime is 21221011297. The next prime is 21221011309. The reversal of 21221011302 is 20311012212.

It is a super-2 number, since 2×21221011302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221011309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47794849 + ... + 47795292.

It is an arithmetic number, because the mean of its divisors is an integer number (2724319047).

Almost surely, 2^21221011302 is an apocalyptic number.

21221011302 is an abundant number, since it is smaller than the sum of its proper divisors (22368093450).

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

21221011302 is a wasteful number, since it uses less digits than its factorization.

21221011302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95590183.

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

Adding to 21221011302 its reverse (20311012212), we get a palindrome (41532023514).

The spelling of 21221011302 in words is "twenty-one billion, two hundred twenty-one million, eleven thousand, three hundred two".