221100021006037 has 2 divisors, whose sum is σ = 221100021006038. Its totient is φ = 221100021006036.

The previous prime is 221100021006001. The next prime is 221100021006091. The reversal of 221100021006037 is 730600120001122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164490859509201 + 56609161496836 = 12825399^2 + 7523906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221100021006037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221100021006437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550010503018 + 110550010503019.

It is an arithmetic number, because the mean of its divisors is an integer number (110550010503019).

Almost surely, 2^{221100021006037} is an apocalyptic number.

It is an amenable number.

221100021006037 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100021006037 is an equidigital number, since it uses as much as digits as its factorization.

221100021006037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 221100021006037 its reverse (730600120001122), we get a palindrome (951700141007159).

The spelling of 221100021006037 in words is "two hundred twenty-one trillion, one hundred billion, twenty-one million, six thousand, thirty-seven".