21221023213302 has 64 divisors (see below), whose sum is σ = 46327678410240. Its totient is φ = 6426827654400.

The previous prime is 21221023213277. The next prime is 21221023213337. The reversal of 21221023213302 is 20331232012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 896562724 + ... + 896586392.

It is an arithmetic number, because the mean of its divisors is an integer number (723869975160).

Almost surely, 2^{21221023213302} is an apocalyptic number.

21221023213302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221023213302 is an abundant number, since it is smaller than the sum of its proper divisors (25106655196938).

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

21221023213302 is a wasteful number, since it uses less digits than its factorization.

21221023213302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31109.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21221023213302 its reverse (20331232012212), we get a palindrome (41552255225514).

The spelling of 21221023213302 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-three million, two hundred thirteen thousand, three hundred two".