221012112131 has 8 divisors (see below), whose sum is σ = 221474651424. Its totient is φ = 220549953600.

The previous prime is 221012112127. The next prime is 221012112137. The reversal of 221012112131 is 131211210122.

It is a happy number.

221012112131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221012112131 - 2² = 221012112127 is a prime.

It is a super-2 number, since 2×221012112131² (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 (221012112137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082090 + ... + 1270016.

It is an arithmetic number, because the mean of its divisors is an integer number (27684331428).

Almost surely, 2^221012112131 is an apocalyptic number.

221012112131 is a deficient number, since it is larger than the sum of its proper divisors (462539293).

221012112131 is a wasteful number, since it uses less digits than its factorization.

221012112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190381.

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

Adding to 221012112131 its reverse (131211210122), we get a palindrome (352223322253).

The spelling of 221012112131 in words is "two hundred twenty-one billion, twelve million, one hundred twelve thousand, one hundred thirty-one".