1221221111093 has 2 divisors, whose sum is σ = 1221221111094. Its totient is φ = 1221221111092.

The previous prime is 1221221111053. The next prime is 1221221111107. The reversal of 1221221111093 is 3901111221221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 782159822404 + 439061288689 = 884398^2 + 662617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221221111093 - 2²² = 1221216916789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221221111053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610610555546 + 610610555547.

It is an arithmetic number, because the mean of its divisors is an integer number (610610555547).

Almost surely, 2^{1221221111093} is an apocalyptic number.

It is an amenable number.

1221221111093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221221111093 is an equidigital number, since it uses as much as digits as its factorization.

1221221111093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1221221111093 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, ninety-three".