1221514031 has 2 divisors, whose sum is σ = 1221514032. Its totient is φ = 1221514030.

The previous prime is 1221514027. The next prime is 1221514087. The reversal of 1221514031 is 1304151221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221514031 - 2² = 1221514027 is a prime.

It is a super-2 number, since 2×1221514031² = 2984193055859737922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221513994 and 1221514012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221514831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610757015 + 610757016.

It is an arithmetic number, because the mean of its divisors is an integer number (610757016).

Almost surely, 2^1221514031 is an apocalyptic number.

1221514031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221514031 is an equidigital number, since it uses as much as digits as its factorization.

1221514031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1221514031 is about 34950.1649638453. The cubic root of 1221514031 is about 1068.9715657684.

Adding to 1221514031 its reverse (1304151221), we get a palindrome (2525665252).

The spelling of 1221514031 in words is "one billion, two hundred twenty-one million, five hundred fourteen thousand, thirty-one".