21212022011131 has 4 divisors (see below), whose sum is σ = 24242310869872. Its totient is φ = 18181733152392.

The previous prime is 21212022011123. The next prime is 21212022011171. The reversal of 21212022011131 is 13111022021212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21212022011131 - 2³ = 21212022011123 is a prime.

It is a super-2 number, since 2×21212022011131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21212022011099 and 21212022011108.

It is not an unprimeable number, because it can be changed into a prime (21212022011171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515144429360 + ... + 1515144429373.

It is an arithmetic number, because the mean of its divisors is an integer number (6060577717468).

Almost surely, 2^{21212022011131} is an apocalyptic number.

21212022011131 is a deficient number, since it is larger than the sum of its proper divisors (3030288858741).

21212022011131 is an equidigital number, since it uses as much as digits as its factorization.

21212022011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030288858740.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21212022011131 its reverse (13111022021212), we get a palindrome (34323044032343).

The spelling of 21212022011131 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, eleven thousand, one hundred thirty-one".