121011312143 has 16 divisors (see below), whose sum is σ = 135368081280. Its totient is φ = 107625939456.

The previous prime is 121011312139. The next prime is 121011312167. The reversal of 121011312143 is 341213110121.

It is a cyclic number.

It is not a de Polignac number, because 121011312143 - 2² = 121011312139 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 (121011312043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2588096 + ... + 2634437.

It is an arithmetic number, because the mean of its divisors is an integer number (8460505080).

Almost surely, 2^121011312143 is an apocalyptic number.

121011312143 is a deficient number, since it is larger than the sum of its proper divisors (14356769137).

121011312143 is a wasteful number, since it uses less digits than its factorization.

121011312143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222626.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 121011312143 its reverse (341213110121), we get a palindrome (462224422264).

The spelling of 121011312143 in words is "one hundred twenty-one billion, eleven million, three hundred twelve thousand, one hundred forty-three".