1213203031 has 2 divisors, whose sum is σ = 1213203032. Its totient is φ = 1213203030.

The previous prime is 1213202993. The next prime is 1213203059. The reversal of 1213203031 is 1303023121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213203031 - 2⁹ = 1213202519 is a prime.

It is a super-3 number, since 3×1213203031³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1213202996 and 1213203014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213203071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606601515 + 606601516.

It is an arithmetic number, because the mean of its divisors is an integer number (606601516).

Almost surely, 2^1213203031 is an apocalyptic number.

1213203031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213203031 is an equidigital number, since it uses as much as digits as its factorization.

1213203031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213203031 is about 34831.0641669186. The cubic root of 1213203031 is about 1066.5416719528.

Adding to 1213203031 its reverse (1303023121), we get a palindrome (2516226152).

The spelling of 1213203031 in words is "one billion, two hundred thirteen million, two hundred three thousand, thirty-one".