212106220131 has 16 divisors (see below), whose sum is σ = 304573354400. Its totient is φ = 130522371840.

The previous prime is 212106220103. The next prime is 212106220141. The reversal of 212106220131 is 131022601212.

It is not a de Polignac number, because 212106220131 - 2¹⁰ = 212106219107 is a prime.

It is a super-2 number, since 2×212106220131² (a number of 23 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 = 212106220098 and 212106220107.

It is not an unprimeable number, because it can be changed into a prime (212106220141) 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, 1305801 + ... + 1459221.

It is an arithmetic number, because the mean of its divisors is an integer number (19035834650).

Almost surely, 2^212106220131 is an apocalyptic number.

212106220131 is a deficient number, since it is larger than the sum of its proper divisors (92467134269).

212106220131 is a wasteful number, since it uses less digits than its factorization.

212106220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188886.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 212106220131 its reverse (131022601212), we get a palindrome (343128821343).

The spelling of 212106220131 in words is "two hundred twelve billion, one hundred six million, two hundred twenty thousand, one hundred thirty-one".