121212121153 has 2 divisors, whose sum is σ = 121212121154. Its totient is φ = 121212121152.

The previous prime is 121212121007. The next prime is 121212121169. The reversal of 121212121153 is 351121212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75080384064 + 46131737089 = 274008^2 + 214783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212121153 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212122153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606060576 + 60606060577.

It is an arithmetic number, because the mean of its divisors is an integer number (60606060577).

Almost surely, 2^121212121153 is an apocalyptic number.

It is an amenable number.

121212121153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212121153 is an equidigital number, since it uses as much as digits as its factorization.

121212121153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

Adding to 121212121153 its reverse (351121212121), we get a palindrome (472333333274).

The spelling of 121212121153 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, one hundred fifty-three".