1221341941 has 2 divisors, whose sum is σ = 1221341942. Its totient is φ = 1221341940.

The previous prime is 1221341923. The next prime is 1221341971. The reversal of 1221341941 is 1491431221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1221222916 + 119025 = 34946^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221341941 - 2⁵ = 1221341909 is a prime.

It is a super-2 number, since 2×1221341941² = 2983352273691294962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221341971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610670970 + 610670971.

It is an arithmetic number, because the mean of its divisors is an integer number (610670971).

Almost surely, 2^1221341941 is an apocalyptic number.

It is an amenable number.

1221341941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221341941 is an equidigital number, since it uses as much as digits as its factorization.

1221341941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 1221341941 is about 34947.7029431120. The cubic root of 1221341941 is about 1068.9213636008.

The spelling of 1221341941 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, nine hundred forty-one".