121429606924121 has 4 divisors (see below), whose sum is σ = 122793984530100. Its totient is φ = 120065229318144.

The previous prime is 121429606924091. The next prime is 121429606924237.

121429606924121 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14013193296400 + 107416413627721 = 3743420^2 + 10364189^2 .

It is a cyclic number.

It is not a de Polignac number, because 121429606924121 - 2²² = 121429602729817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121429606924121.

It is not an unprimeable number, because it can be changed into a prime (121429606920121) 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, 682188802856 + ... + 682188803033.

It is an arithmetic number, because the mean of its divisors is an integer number (30698496132525).

Almost surely, 2^{121429606924121} is an apocalyptic number.

It is an amenable number.

121429606924121 is a deficient number, since it is larger than the sum of its proper divisors (1364377605979).

121429606924121 is an equidigital number, since it uses as much as digits as its factorization.

121429606924121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364377605978.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 121429606924121 in words is "one hundred twenty-one trillion, four hundred twenty-nine billion, six hundred six million, nine hundred twenty-four thousand, one hundred twenty-one".