21212313011131 has 16 divisors (see below), whose sum is σ = 23168261219328. Its totient is φ = 19260960260800.

The previous prime is 21212313011051. The next prime is 21212313011171. The reversal of 21212313011131 is 13111031321212.

It is a cyclic number.

It is not a de Polignac number, because 21212313011131 - 2⁷ = 21212313011003 is a prime.

It is a super-2 number, since 2×21212313011131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212313011171) 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, 177429831 + ... + 177549343.

It is an arithmetic number, because the mean of its divisors is an integer number (1448016326208).

Almost surely, 2^{21212313011131} is an apocalyptic number.

21212313011131 is a deficient number, since it is larger than the sum of its proper divisors (1955948208197).

21212313011131 is a wasteful number, since it uses less digits than its factorization.

21212313011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138602.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21212313011131 its reverse (13111031321212), we get a palindrome (34323344332343).

The spelling of 21212313011131 in words is "twenty-one trillion, two hundred twelve billion, three hundred thirteen million, eleven thousand, one hundred thirty-one".