1221476441 has 2 divisors, whose sum is σ = 1221476442. Its totient is φ = 1221476440.

The previous prime is 1221476423. The next prime is 1221476461. The reversal of 1221476441 is 1446741221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149481216 + 71995225 = 33904^2 + 8485^2 .

It is an emirp because it is prime and its reverse (1446741221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221476441 - 2¹⁸ = 1221214297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221476398 and 1221476407.

It is not a weakly prime, because it can be changed into another prime (1221476461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610738220 + 610738221.

It is an arithmetic number, because the mean of its divisors is an integer number (610738221).

Almost surely, 2^1221476441 is an apocalyptic number.

It is an amenable number.

1221476441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221476441 is an equidigital number, since it uses as much as digits as its factorization.

1221476441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 1221476441 is about 34949.6271940059. The cubic root of 1221476441 is about 1068.9606004002.

The spelling of 1221476441 in words is "one billion, two hundred twenty-one million, four hundred seventy-six thousand, four hundred forty-one".