121321135105 has 8 divisors (see below), whose sum is σ = 145776674664. Its totient is φ = 96929366400.

The previous prime is 121321135097. The next prime is 121321135213. The reversal of 121321135105 is 501531123121.

It can be written as a sum of positive squares in 4 ways, for example, as 8005417729 + 113315717376 = 89473^2 + 336624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121321135105 - 2³ = 121321135097 is a prime.

It is a super-2 number, since 2×121321135105² (a number of 23 digits) contains 22 as substring.

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 121321135105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15938526 + ... + 15946135.

It is an arithmetic number, because the mean of its divisors is an integer number (18222084333).

Almost surely, 2^121321135105 is an apocalyptic number.

It is an amenable number.

121321135105 is a deficient number, since it is larger than the sum of its proper divisors (24455539559).

121321135105 is an equidigital number, since it uses as much as digits as its factorization.

121321135105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31885427.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 121321135105 its reverse (501531123121), we get a palindrome (622852258226).

The spelling of 121321135105 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-five thousand, one hundred five".