1213203011 has 32 divisors (see below), whose sum is σ = 1398767616. Its totient is φ = 1045440000.

The previous prime is 1213202993. The next prime is 1213203031. The reversal of 1213203011 is 1103023121.

It is a cyclic number.

It is not a de Polignac number, because 1213203011 - 2³⁰ = 139461187 is a prime.

It is a super-2 number, since 2×1213203011² = 2943723091798932242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213203031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1223726 + ... + 1224716.

It is an arithmetic number, because the mean of its divisors is an integer number (43711488).

Almost surely, 2^1213203011 is an apocalyptic number.

1213203011 is a deficient number, since it is larger than the sum of its proper divisors (185564605).

1213203011 is a wasteful number, since it uses less digits than its factorization.

1213203011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

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

The square root of 1213203011 is about 34831.0638798185. The cubic root of 1213203011 is about 1066.5416660920.

Adding to 1213203011 its reverse (1103023121), we get a palindrome (2316226132).

The spelling of 1213203011 in words is "one billion, two hundred thirteen million, two hundred three thousand, eleven".