1212200022121 has 12 divisors (see below), whose sum is σ = 1332910778416. Its totient is φ = 1101592629720.

The previous prime is 1212200022119. The next prime is 1212200022149.

It is a happy number.

1212200022121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1212200022121 - 2¹ = 1212200022119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212200022095 and 1212200022104.

It is not an unprimeable number, because it can be changed into a prime (1212200022221) 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 in 11 ways as a sum of consecutive naturals, for example, 1522875 + ... + 2177968.

Almost surely, 2^{1212200022121} is an apocalyptic number.

1212200022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212200022121 is a deficient number, since it is larger than the sum of its proper divisors (120710756295).

1212200022121 is a wasteful number, since it uses less digits than its factorization.

1212200022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703572 (or 3703561 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

It can be divided in two parts, 12122000 and 22121, that added together give a palindrome (12144121).

The spelling of 1212200022121 in words is "one trillion, two hundred twelve billion, two hundred million, twenty-two thousand, one hundred twenty-one".