1203123011 has 2 divisors, whose sum is σ = 1203123012. Its totient is φ = 1203123010.

The previous prime is 1203123007. The next prime is 1203123023. The reversal of 1203123011 is 1103213021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1203123011 - 2² = 1203123007 is a prime.

It is a super-2 number, since 2×1203123011² = 2895009959195412242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1203123041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601561505 + 601561506.

It is an arithmetic number, because the mean of its divisors is an integer number (601561506).

Almost surely, 2^1203123011 is an apocalyptic number.

1203123011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203123011 is an equidigital number, since it uses as much as digits as its factorization.

1203123011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1203123011 is about 34686.0636423334. The cubic root of 1203123011 is about 1063.5796301767.

Adding to 1203123011 its reverse (1103213021), we get a palindrome (2306336032).

The spelling of 1203123011 in words is "one billion, two hundred three million, one hundred twenty-three thousand, eleven".