1200220002121 has 16 divisors (see below), whose sum is σ = 1375780368384. Its totient is φ = 1025686759104.

The previous prime is 1200220002097. The next prime is 1200220002131. The reversal of 1200220002121 is 1212000220021.

It is a happy number.

It is not a de Polignac number, because 1200220002121 - 2⁷ = 1200220001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200220002131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7136815 + ... + 7303051.

It is an arithmetic number, because the mean of its divisors is an integer number (85986273024).

Almost surely, 2^{1200220002121} is an apocalyptic number.

It is an amenable number.

1200220002121 is a deficient number, since it is larger than the sum of its proper divisors (175560366263).

1200220002121 is a wasteful number, since it uses less digits than its factorization.

1200220002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169320.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200220002121 its reverse (1212000220021), we get a palindrome (2412220222142).

The spelling of 1200220002121 in words is "one trillion, two hundred billion, two hundred twenty million, two thousand, one hundred twenty-one".