21214036501042 has 64 divisors (see below), whose sum is σ = 40813275340800. Its totient is φ = 8028398289600.

The previous prime is 21214036501039. The next prime is 21214036501067. The reversal of 21214036501042 is 24010563041212.

It is a junction number, because it is equal to n+sod(n) for n = 21214036500995 and 21214036501013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305367 + ... + 6520837.

It is an arithmetic number, because the mean of its divisors is an integer number (637707427200).

Almost surely, 2^{21214036501042} is an apocalyptic number.

21214036501042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21214036501042 is a deficient number, since it is larger than the sum of its proper divisors (19599238839758).

21214036501042 is a wasteful number, since it uses less digits than its factorization.

21214036501042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216127.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21214036501042 its reverse (24010563041212), we get a palindrome (45224599542254).

The spelling of 21214036501042 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred one thousand, forty-two".