21311231321202 has 8 divisors (see below), whose sum is σ = 42622462642416. Its totient is φ = 7103743773732.

The previous prime is 21311231321197. The next prime is 21311231321203. The reversal of 21311231321202 is 20212313211312.

It is a sphenic number, since it is the product of 3 distinct primes.

21311231321202 is an admirable number.

It is a super-3 number, since 3×21311231321202³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21311231321203) 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 3 ways as a sum of consecutive naturals, for example, 1775935943428 + ... + 1775935943439.

It is an arithmetic number, because the mean of its divisors is an integer number (5327807830302).

Almost surely, 2^{21311231321202} is an apocalyptic number.

21311231321202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21311231321202 is a wasteful number, since it uses less digits than its factorization.

21311231321202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551871886872.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21311231321202 its reverse (20212313211312), we get a palindrome (41523544532514).

The spelling of 21311231321202 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred two".