221210231042131 has 2 divisors, whose sum is σ = 221210231042132. Its totient is φ = 221210231042130.

The previous prime is 221210231042111. The next prime is 221210231042161. The reversal of 221210231042131 is 131240132012122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221210231042131 - 2¹⁵ = 221210231009363 is a prime.

It is a super-2 number, since 2×221210231042131² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221210231042096 and 221210231042105.

It is not a weakly prime, because it can be changed into another prime (221210231042111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605115521065 + 110605115521066.

It is an arithmetic number, because the mean of its divisors is an integer number (110605115521066).

Almost surely, 2^{221210231042131} is an apocalyptic number.

221210231042131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210231042131 is an equidigital number, since it uses as much as digits as its factorization.

221210231042131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 221210231042131 its reverse (131240132012122), we get a palindrome (352450363054253).

The spelling of 221210231042131 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred thirty-one million, forty-two thousand, one hundred thirty-one".