121000221101011 has 4 divisors (see below), whose sum is σ = 138285966972592. Its totient is φ = 103714475229432.

The previous prime is 121000221101009. The next prime is 121000221101057. The reversal of 121000221101011 is 110101122000121.

It is a happy number.

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 121000221101011 - 2¹ = 121000221101009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000221100982 and 121000221101000.

It is not an unprimeable number, because it can be changed into a prime (121000221131011) 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, 8642872935780 + ... + 8642872935793.

It is an arithmetic number, because the mean of its divisors is an integer number (34571491743148).

Almost surely, 2^{121000221101011} is an apocalyptic number.

121000221101011 is a deficient number, since it is larger than the sum of its proper divisors (17285745871581).

121000221101011 is an equidigital number, since it uses as much as digits as its factorization.

121000221101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17285745871580.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121000221101011 its reverse (110101122000121), we get a palindrome (231101343101132).

The spelling of 121000221101011 in words is "one hundred twenty-one trillion, two hundred twenty-one million, one hundred one thousand, eleven".