1210123553 has 2 divisors, whose sum is σ = 1210123554. Its totient is φ = 1210123552.

The previous prime is 1210123543. The next prime is 1210123589. The reversal of 1210123553 is 3553210121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678498304 + 531625249 = 26048^2 + 23057^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210123553 - 2⁶ = 1210123489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210123543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605061776 + 605061777.

It is an arithmetic number, because the mean of its divisors is an integer number (605061777).

Almost surely, 2^1210123553 is an apocalyptic number.

It is an amenable number.

1210123553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210123553 is an equidigital number, since it uses as much as digits as its factorization.

1210123553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1210123553 is about 34786.8301660269. The cubic root of 1210123553 is about 1065.6385050510.

Adding to 1210123553 its reverse (3553210121), we get a palindrome (4763333674).

The spelling of 1210123553 in words is "one billion, two hundred ten million, one hundred twenty-three thousand, five hundred fifty-three".