212110221131 has 4 divisors (see below), whose sum is σ = 223273917000. Its totient is φ = 200946525264.

The previous prime is 212110221047. The next prime is 212110221143. The reversal of 212110221131 is 131122011212.

It is a happy number.

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 212110221131 - 2³⁰ = 211036479307 is a prime.

It is a super-2 number, since 2×212110221131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212110221151) 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, 5581847906 + ... + 5581847943.

It is an arithmetic number, because the mean of its divisors is an integer number (55818479250).

Almost surely, 2^212110221131 is an apocalyptic number.

212110221131 is a deficient number, since it is larger than the sum of its proper divisors (11163695869).

212110221131 is a wasteful number, since it uses less digits than its factorization.

212110221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11163695868.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212110221131 its reverse (131122011212), we get a palindrome (343232232343).

The spelling of 212110221131 in words is "two hundred twelve billion, one hundred ten million, two hundred twenty-one thousand, one hundred thirty-one".