121401012143 has 4 divisors (see below), whose sum is σ = 121524513648. Its totient is φ = 121277510640.

The previous prime is 121401012127. The next prime is 121401012157. The reversal of 121401012143 is 341210104121.

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 121401012143 - 2⁴ = 121401012127 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 (121401012043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61749278 + ... + 61751243.

It is an arithmetic number, because the mean of its divisors is an integer number (30381128412).

Almost surely, 2^121401012143 is an apocalyptic number.

121401012143 is a deficient number, since it is larger than the sum of its proper divisors (123501505).

121401012143 is an equidigital number, since it uses as much as digits as its factorization.

121401012143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123501504.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121401012143 its reverse (341210104121), we get a palindrome (462611116264).

The spelling of 121401012143 in words is "one hundred twenty-one billion, four hundred one million, twelve thousand, one hundred forty-three".