121121120002 has 4 divisors (see below), whose sum is σ = 181681680006. Its totient is φ = 60560560000.

The previous prime is 121121119981. The next prime is 121121120009. The reversal of 121121120002 is 200021121121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 100090609641 + 21030510361 = 316371^2 + 145019^2 .

It is not an unprimeable number, because it can be changed into a prime (121121120009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30280279999 + ... + 30280280002.

Almost surely, 2^121121120002 is an apocalyptic number.

121121120002 is a deficient number, since it is larger than the sum of its proper divisors (60560560004).

121121120002 is an equidigital number, since it uses as much as digits as its factorization.

121121120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60560560003.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121120002 its reverse (200021121121), we get a palindrome (321142241123).

The spelling of 121121120002 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, two".