121142012311 has 4 divisors (see below), whose sum is σ = 122601554712. Its totient is φ = 119682469912.

The previous prime is 121142012261. The next prime is 121142012323. The reversal of 121142012311 is 113210241121.

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 121142012311 - 2¹⁷ = 121141881239 is a prime.

It is a super-3 number, since 3×121142012311³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121142012611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729771076 + ... + 729771241.

It is an arithmetic number, because the mean of its divisors is an integer number (30650388678).

Almost surely, 2^121142012311 is an apocalyptic number.

121142012311 is a deficient number, since it is larger than the sum of its proper divisors (1459542401).

121142012311 is an equidigital number, since it uses as much as digits as its factorization.

121142012311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459542400.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121142012311 its reverse (113210241121), we get a palindrome (234352253432).

The spelling of 121142012311 in words is "one hundred twenty-one billion, one hundred forty-two million, twelve thousand, three hundred eleven".