120121200002 has 4 divisors (see below), whose sum is σ = 180181800006. Its totient is φ = 60060600000.

The previous prime is 120121199993. The next prime is 120121200007. The reversal of 120121200002 is 200002121021.

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: 200002121021 = 197 ⋅1015239193.

It can be written as a sum of positive squares in only one way, i.e., 68104818961 + 52016381041 = 260969^2 + 228071^2 .

It is not an unprimeable number, because it can be changed into a prime (120121200007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30030299999 + ... + 30030300002.

Almost surely, 2^120121200002 is an apocalyptic number.

120121200002 is a deficient number, since it is larger than the sum of its proper divisors (60060600004).

120121200002 is an equidigital number, since it uses as much as digits as its factorization.

120121200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60060600003.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 120121200002 its reverse (200002121021), we get a palindrome (320123321023).

The spelling of 120121200002 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred thousand, two".