21131012213011 has 8 divisors (see below), whose sum is σ = 21141527574384. Its totient is φ = 21120497909280.

The previous prime is 21131012213009. The next prime is 21131012213023. The reversal of 21131012213011 is 11031221013112.

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

It is a cyclic number.

It is not a de Polignac number, because 21131012213011 - 2¹ = 21131012213009 is a prime.

It is a super-2 number, since 2×21131012213011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21131012213011.

It is not an unprimeable number, because it can be changed into a prime (21131012217011) 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 7 ways as a sum of consecutive naturals, for example, 41324941 + ... + 41833153.

It is an arithmetic number, because the mean of its divisors is an integer number (2642690946798).

Almost surely, 2^{21131012213011} is an apocalyptic number.

21131012213011 is a deficient number, since it is larger than the sum of its proper divisors (10515361373).

21131012213011 is a wasteful number, since it uses less digits than its factorization.

21131012213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528821.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21131012213011 its reverse (11031221013112), we get a palindrome (32162233226123).

The spelling of 21131012213011 in words is "twenty-one trillion, one hundred thirty-one billion, twelve million, two hundred thirteen thousand, eleven".