1221111010037 has 2 divisors, whose sum is σ = 1221111010038. Its totient is φ = 1221111010036.

The previous prime is 1221111009947. The next prime is 1221111010039. The reversal of 1221111010037 is 7300101111221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022021924401 + 199089085636 = 1010951^2 + 446194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221111010037 is a prime.

It is a super-2 number, since 2×1221111010037² (a number of 25 digits) contains 22 as substring.

Together with 1221111010039, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221111010039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610555505018 + 610555505019.

It is an arithmetic number, because the mean of its divisors is an integer number (610555505019).

Almost surely, 2^{1221111010037} is an apocalyptic number.

It is an amenable number.

1221111010037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221111010037 is an equidigital number, since it uses as much as digits as its factorization.

1221111010037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 1221111010037 its reverse (7300101111221), we get a palindrome (8521212121258).

The spelling of 1221111010037 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, ten thousand, thirty-seven".