121231211351 has 2 divisors, whose sum is σ = 121231211352. Its totient is φ = 121231211350.

The previous prime is 121231211219. The next prime is 121231211357. The reversal of 121231211351 is 153112132121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121231211351 - 2¹⁴ = 121231194967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121231211357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615605675 + 60615605676.

It is an arithmetic number, because the mean of its divisors is an integer number (60615605676).

Almost surely, 2^121231211351 is an apocalyptic number.

121231211351 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231211351 is an equidigital number, since it uses as much as digits as its factorization.

121231211351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

Adding to 121231211351 its reverse (153112132121), we get a palindrome (274343343472).

The spelling of 121231211351 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred eleven thousand, three hundred fifty-one".