121001320311 has 4 divisors (see below), whose sum is σ = 161335093752. Its totient is φ = 80667546872.

The previous prime is 121001320301. The next prime is 121001320337. The reversal of 121001320311 is 113023100121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113023100121 = 3 ⋅37674366707.

It is a cyclic number.

It is not a de Polignac number, because 121001320311 - 2¹³ = 121001312119 is a prime.

It is a super-2 number, since 2×121001320311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001320301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20166886716 + ... + 20166886721.

It is an arithmetic number, because the mean of its divisors is an integer number (40333773438).

Almost surely, 2^121001320311 is an apocalyptic number.

121001320311 is a deficient number, since it is larger than the sum of its proper divisors (40333773441).

121001320311 is an equidigital number, since it uses as much as digits as its factorization.

121001320311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40333773440.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121001320311 its reverse (113023100121), we get a palindrome (234024420432).

The spelling of 121001320311 in words is "one hundred twenty-one billion, one million, three hundred twenty thousand, three hundred eleven".