121000011121001 has 4 divisors (see below), whose sum is σ = 121506287318400. Its totient is φ = 120493734923604.

The previous prime is 121000011120991. The next prime is 121000011121123. The reversal of 121000011121001 is 100121110000121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000011121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121000011121501) 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, 253138098341 + ... + 253138098818.

It is an arithmetic number, because the mean of its divisors is an integer number (30376571829600).

Almost surely, 2^{121000011121001} is an apocalyptic number.

It is an amenable number.

121000011121001 is a deficient number, since it is larger than the sum of its proper divisors (506276197399).

121000011121001 is an equidigital number, since it uses as much as digits as its factorization.

121000011121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506276197398.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121000011121001 its reverse (100121110000121), we get a palindrome (221121121121122).

The spelling of 121000011121001 in words is "one hundred twenty-one trillion, eleven million, one hundred twenty-one thousand, one".