221211021000037 has 2 divisors, whose sum is σ = 221211021000038. Its totient is φ = 221211021000036.

The previous prime is 221211020999987. The next prime is 221211021000041. The reversal of 221211021000037 is 730000120112122.

221211021000037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220861031623236 + 349989376801 = 14861394^2 + 591599^2 .

It is a cyclic number.

It is not a de Polignac number, because 221211021000037 - 2⁴³ = 212414927977829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221211020999981 and 221211021000017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211021000097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605510500018 + 110605510500019.

It is an arithmetic number, because the mean of its divisors is an integer number (110605510500019).

Almost surely, 2^{221211021000037} is an apocalyptic number.

It is an amenable number.

221211021000037 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211021000037 is an equidigital number, since it uses as much as digits as its factorization.

221211021000037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 221211021000037 its reverse (730000120112122), we get a palindrome (951211141112159).

The spelling of 221211021000037 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-one million, thirty-seven", and thus it is an aban number.