121262143 has 2 divisors, whose sum is σ = 121262144. Its totient is φ = 121262142.

The previous prime is 121262131. The next prime is 121262149. The reversal of 121262143 is 341262121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121262143 - 2⁹ = 121261631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121262149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60631071 + 60631072.

It is an arithmetic number, because the mean of its divisors is an integer number (60631072).

Almost surely, 2^121262143 is an apocalyptic number.

121262143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121262143 is an equidigital number, since it uses as much as digits as its factorization.

121262143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 121262143 is about 11011.9091441948. The cubic root of 121262143 is about 494.9656718703.

Subtracting from 121262143 its sum of digits (22), we obtain a palindrome (121262121).

The spelling of 121262143 in words is "one hundred twenty-one million, two hundred sixty-two thousand, one hundred forty-three".