21221231323002 has 16 divisors (see below), whose sum is σ = 43138240722912. Its totient is φ = 6957780761520.

The previous prime is 21221231322997. The next prime is 21221231323013. The reversal of 21221231323002 is 20032313212212.

It is a super-2 number, since 2×21221231323002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28990752808 + ... + 28990753539.

It is an arithmetic number, because the mean of its divisors is an integer number (2696140045182).

Almost surely, 2^{21221231323002} is an apocalyptic number.

21221231323002 is an abundant number, since it is smaller than the sum of its proper divisors (21917009399910).

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

21221231323002 is a wasteful number, since it uses less digits than its factorization.

21221231323002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57981506413.

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

Adding to 21221231323002 its reverse (20032313212212), we get a palindrome (41253544535214).

The spelling of 21221231323002 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-three thousand, two".