121254012101143 has 4 divisors (see below), whose sum is σ = 123309164848680. Its totient is φ = 119198859353608.

The previous prime is 121254012101051. The next prime is 121254012101147. The reversal of 121254012101143 is 341101210452121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121254012101143 - 2¹⁷ = 121254011970071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121254012101147) 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 in 3 ways as a sum of consecutive naturals, for example, 1027576373680 + ... + 1027576373797.

It is an arithmetic number, because the mean of its divisors is an integer number (30827291212170).

Almost surely, 2^{121254012101143} is an apocalyptic number.

121254012101143 is a deficient number, since it is larger than the sum of its proper divisors (2055152747537).

121254012101143 is an equidigital number, since it uses as much as digits as its factorization.

121254012101143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055152747536.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 121254012101143 its reverse (341101210452121), we get a palindrome (462355222553264).

The spelling of 121254012101143 in words is "one hundred twenty-one trillion, two hundred fifty-four billion, twelve million, one hundred one thousand, one hundred forty-three".