121121001121 has 4 divisors (see below), whose sum is σ = 121122816192. Its totient is φ = 121119186052.

The previous prime is 121121001101. The next prime is 121121001173. The reversal of 121121001121 is 121100121121.

It is a happy number.

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 not a de Polignac number, because 121121001121 - 2⁷ = 121121000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121001101) 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, 803461 + ... + 942226.

It is an arithmetic number, because the mean of its divisors is an integer number (30280704048).

Almost surely, 2^121121001121 is an apocalyptic number.

It is an amenable number.

121121001121 is a deficient number, since it is larger than the sum of its proper divisors (1815071).

121121001121 is an equidigital number, since it uses as much as digits as its factorization.

121121001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815070.

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

Adding to 121121001121 its reverse (121100121121), we get a palindrome (242221122242).

The spelling of 121121001121 in words is "one hundred twenty-one billion, one hundred twenty-one million, one thousand, one hundred twenty-one".