21315331305202 has 16 divisors (see below), whose sum is σ = 34991786217024. Its totient is φ = 9657633298000.

The previous prime is 21315331305199. The next prime is 21315331305259. The reversal of 21315331305202 is 20250313351312.

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, 1557675949 + ... + 1557689632.

It is an arithmetic number, because the mean of its divisors is an integer number (2186986638564).

Almost surely, 2^{21315331305202} is an apocalyptic number.

21315331305202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21315331305202 is a deficient number, since it is larger than the sum of its proper divisors (13676454911822).

21315331305202 is a wasteful number, since it uses less digits than its factorization.

21315331305202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115365905.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 21315331305202 its reverse (20250313351312), we get a palindrome (41565644656514).

The spelling of 21315331305202 in words is "twenty-one trillion, three hundred fifteen billion, three hundred thirty-one million, three hundred five thousand, two hundred two".