1220975611 has 2 divisors, whose sum is σ = 1220975612. Its totient is φ = 1220975610.

The previous prime is 1220975597. The next prime is 1220975633. The reversal of 1220975611 is 1165790221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220975611 - 2²³ = 1212587003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220975011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610487805 + 610487806.

It is an arithmetic number, because the mean of its divisors is an integer number (610487806).

Almost surely, 2^1220975611 is an apocalyptic number.

1220975611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220975611 is an equidigital number, since it uses as much as digits as its factorization.

1220975611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 1220975611 is about 34942.4614330473. The cubic root of 1220975611 is about 1068.8144819524.

The spelling of 1220975611 in words is "one billion, two hundred twenty million, nine hundred seventy-five thousand, six hundred eleven".