1200222212121 has 32 divisors (see below), whose sum is σ = 1790128247040. Its totient is φ = 794740032000.

The previous prime is 1200222212093. The next prime is 1200222212141. The reversal of 1200222212121 is 1212122220021.

It is a happy number.

It is not a de Polignac number, because 1200222212121 - 2¹⁴ = 1200222195737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200222212094 and 1200222212103.

It is not an unprimeable number, because it can be changed into a prime (1200222212141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38850601 + ... + 38881481.

It is an arithmetic number, because the mean of its divisors is an integer number (55941507720).

Almost surely, 2^{1200222212121} is an apocalyptic number.

It is an amenable number.

1200222212121 is a deficient number, since it is larger than the sum of its proper divisors (589906034919).

1200222212121 is a wasteful number, since it uses less digits than its factorization.

1200222212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40574 (or 40568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1200222212121 its reverse (1212122220021), we get a palindrome (2412344432142).

The spelling of 1200222212121 in words is "one trillion, two hundred billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".