1213021031 has 2 divisors, whose sum is σ = 1213021032. Its totient is φ = 1213021030.

The previous prime is 1213020967. The next prime is 1213021049. The reversal of 1213021031 is 1301203121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213021031 - 2⁶ = 1213020967 is a prime.

It is a super-2 number, since 2×1213021031² = 2942840043296605922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213020997 and 1213021015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213021091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606510515 + 606510516.

It is an arithmetic number, because the mean of its divisors is an integer number (606510516).

Almost surely, 2^1213021031 is an apocalyptic number.

1213021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213021031 is an equidigital number, since it uses as much as digits as its factorization.

1213021031 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 1213021031 is about 34828.4514585418. The cubic root of 1213021031 is about 1066.4883364745.

Adding to 1213021031 its reverse (1301203121), we get a palindrome (2514224152).

The spelling of 1213021031 in words is "one billion, two hundred thirteen million, twenty-one thousand, thirty-one".