21111321131301 has 16 divisors (see below), whose sum is σ = 28255245100544. Its totient is φ = 14020854743664.

The previous prime is 21111321131297. The next prime is 21111321131311. The reversal of 21111321131301 is 10313112311112.

It is not a de Polignac number, because 21111321131301 - 2² = 21111321131297 is a prime.

It is a super-2 number, since 2×21111321131301² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111321131311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4419265 + ... + 7858278.

It is an arithmetic number, because the mean of its divisors is an integer number (1765952818784).

Almost surely, 2^{21111321131301} is an apocalyptic number.

It is an amenable number.

21111321131301 is a deficient number, since it is larger than the sum of its proper divisors (7143923969243).

21111321131301 is a wasteful number, since it uses less digits than its factorization.

21111321131301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12279720.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21111321131301 its reverse (10313112311112), we get a palindrome (31424433442413).

The spelling of 21111321131301 in words is "twenty-one trillion, one hundred eleven billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred one".