21211214013 has 32 divisors (see below), whose sum is σ = 34310200320. Its totient is φ = 12844237680.

The previous prime is 21211213993. The next prime is 21211214027. The reversal of 21211214013 is 31041211212.

It is not a de Polignac number, because 21211214013 - 2⁵ = 21211213981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211214033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322456 + ... + 382622.

It is an arithmetic number, because the mean of its divisors is an integer number (1072193760).

Almost surely, 2^21211214013 is an apocalyptic number.

It is an amenable number.

21211214013 is a deficient number, since it is larger than the sum of its proper divisors (13098986307).

21211214013 is a wasteful number, since it uses less digits than its factorization.

21211214013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61374 (or 61368 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21211214013 its reverse (31041211212), we get a palindrome (52252425225).

The spelling of 21211214013 in words is "twenty-one billion, two hundred eleven million, two hundred fourteen thousand, thirteen".