1200121002122 has 16 divisors (see below), whose sum is σ = 2178370895040. Its totient is φ = 484082420928.

The previous prime is 1200121002061. The next prime is 1200121002133. The reversal of 1200121002122 is 2212001210021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1200121002097 and 1200121002106.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2521262372 + ... + 2521262847.

It is an arithmetic number, because the mean of its divisors is an integer number (136148180940).

Almost surely, 2^{1200121002122} is an apocalyptic number.

1200121002122 is a deficient number, since it is larger than the sum of its proper divisors (978249892918).

1200121002122 is a wasteful number, since it uses less digits than its factorization.

1200121002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042525245.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200121002122 its reverse (2212001210021), we get a palindrome (3412122212143).

It can be divided in two parts, 12001210021 and 22, that multiplied together give a palindrome (264026620462).

The spelling of 1200121002122 in words is "one trillion, two hundred billion, one hundred twenty-one million, two thousand, one hundred twenty-two".