221212240010131 has 16 divisors (see below), whose sum is σ = 229056676761600. Its totient is φ = 213472278452448.

The previous prime is 221212240010117. The next prime is 221212240010149. The reversal of 221212240010131 is 131010042212122.

It is a cyclic number.

It is not a de Polignac number, because 221212240010131 - 2⁴³ = 212416146987923 is a prime.

It is a super-2 number, since 2×221212240010131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212240011131) 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, 41067321 + ... + 46140538.

It is an arithmetic number, because the mean of its divisors is an integer number (14316042297600).

Almost surely, 2^{221212240010131} is an apocalyptic number.

221212240010131 is a deficient number, since it is larger than the sum of its proper divisors (7844436751469).

221212240010131 is a wasteful number, since it uses less digits than its factorization.

221212240010131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87208458.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221212240010131 its reverse (131010042212122), we get a palindrome (352222282222253).

The spelling of 221212240010131 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred forty million, ten thousand, one hundred thirty-one".