221121111037 has 2 divisors, whose sum is σ = 221121111038. Its totient is φ = 221121111036.

The previous prime is 221121111011. The next prime is 221121111059. The reversal of 221121111037 is 730111121122.

It is an a-pointer prime, because the next prime (221121111059) can be obtained adding 221121111037 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205110257881 + 16010853156 = 452891^2 + 126534^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121111037 - 2⁷ = 221121110909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221121110999 and 221121111017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221121111007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560555518 + 110560555519.

It is an arithmetic number, because the mean of its divisors is an integer number (110560555519).

Almost surely, 2^221121111037 is an apocalyptic number.

It is an amenable number.

221121111037 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121111037 is an equidigital number, since it uses as much as digits as its factorization.

221121111037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 22.

Adding to 221121111037 its reverse (730111121122), we get a palindrome (951232232159).

The spelling of 221121111037 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, thirty-seven".