1212222120121 has 16 divisors (see below), whose sum is σ = 1229789030400. Its totient is φ = 1194712850448.

The previous prime is 1212222120119. The next prime is 1212222120139. The reversal of 1212222120121 is 1210212222121.

It is a cyclic number.

It is not a de Polignac number, because 1212222120121 - 2¹ = 1212222120119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212222120721) 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, 110811070 + ... + 110822008.

It is an arithmetic number, because the mean of its divisors is an integer number (76861814400).

Almost surely, 2^{1212222120121} is an apocalyptic number.

It is an amenable number.

1212222120121 is a deficient number, since it is larger than the sum of its proper divisors (17566910279).

1212222120121 is a wasteful number, since it uses less digits than its factorization.

1212222120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13428.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212222120121 its reverse (1210212222121), we get a palindrome (2422434342242).

The spelling of 1212222120121 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty-one".