1213120477 has 2 divisors, whose sum is σ = 1213120478. Its totient is φ = 1213120476.

The previous prime is 1213120387. The next prime is 1213120483. The reversal of 1213120477 is 7740213121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1027779481 + 185340996 = 32059^2 + 13614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213120477 - 2¹⁵ = 1213087709 is a prime.

It is a super-2 number, since 2×1213120477² = 2943322583433415058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213120577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606560238 + 606560239.

It is an arithmetic number, because the mean of its divisors is an integer number (606560239).

Almost surely, 2^1213120477 is an apocalyptic number.

It is an amenable number.

1213120477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213120477 is an equidigital number, since it uses as much as digits as its factorization.

1213120477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1213120477 is about 34829.8790839130. The cubic root of 1213120477 is about 1066.5174799926.

Adding to 1213120477 its reverse (7740213121), we get a palindrome (8953333598).

The spelling of 1213120477 in words is "one billion, two hundred thirteen million, one hundred twenty thousand, four hundred seventy-seven".