2212122122121 has 32 divisors (see below), whose sum is σ = 3155290564608. Its totient is φ = 1373661907200.

The previous prime is 2212122122107. The next prime is 2212122122153. The reversal of 2212122122121 is 1212212212122.

It is not a de Polignac number, because 2212122122121 - 2²³ = 2212113733513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2212122122101) 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, 8310546 + ... + 8572596.

It is an arithmetic number, because the mean of its divisors is an integer number (98602830144).

Almost surely, 2^{2212122122121} is an apocalyptic number.

It is an amenable number.

2212122122121 is a deficient number, since it is larger than the sum of its proper divisors (943168442487).

2212122122121 is a wasteful number, since it uses less digits than its factorization.

2212122122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263781.

The product of its digits is 256, while the sum is 21.

Adding to 2212122122121 its reverse (1212212212122), we get a palindrome (3424334334243).

Subtracting from 2212122122121 its reverse (1212212212122), we obtain a palindrome (999909909999).

It can be divided in two parts, 22 and 12122122121, that multiplied together give a palindrome (266686686662).

The spelling of 2212122122121 in words is "two trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".