221211134031 has 32 divisors (see below), whose sum is σ = 314065059840. Its totient is φ = 138261586176.

The previous prime is 221211134017. The next prime is 221211134051. The reversal of 221211134031 is 130431112122.

It is not a de Polignac number, because 221211134031 - 2³⁴ = 204031264847 is a prime.

It is a super-2 number, since 2×221211134031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221211133989 and 221211134007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211134051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306315 + ... + 732291.

It is an arithmetic number, because the mean of its divisors is an integer number (9814533120).

Almost surely, 2^221211134031 is an apocalyptic number.

221211134031 is a deficient number, since it is larger than the sum of its proper divisors (92853925809).

221211134031 is a wasteful number, since it uses less digits than its factorization.

221211134031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426183.

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

Adding to 221211134031 its reverse (130431112122), we get a palindrome (351642246153).

The spelling of 221211134031 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred thirty-four thousand, thirty-one".