1212213122121 has 8 divisors (see below), whose sum is σ = 1626988032064. Its totient is φ = 802790146800.

The previous prime is 1212213122117. The next prime is 1212213122137.

1212213122121 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212213122121 - 2² = 1212213122117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212213122171) 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 7 ways as a sum of consecutive naturals, for example, 1337983126 + ... + 1337984031.

It is an arithmetic number, because the mean of its divisors is an integer number (203373504008).

Almost surely, 2^{1212213122121} is an apocalyptic number.

It is an amenable number.

1212213122121 is a deficient number, since it is larger than the sum of its proper divisors (414774909943).

1212213122121 is a wasteful number, since it uses less digits than its factorization.

1212213122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675967311.

The product of its digits is 192, while the sum is 21.

Multiplying 1212213122121 by its product of digits (192), we get a palindrome (232744919447232).

The spelling of 1212213122121 in words is "one trillion, two hundred twelve billion, two hundred thirteen million, one hundred twenty-two thousand, one hundred twenty-one".