2212021212121 has 32 divisors (see below), whose sum is σ = 2754086065920. Its totient is φ = 1734350745600.

The previous prime is 2212021211963. The next prime is 2212021212139. The reversal of 2212021212121 is 1212121202122.

It is a cyclic number.

It is not a de Polignac number, because 2212021212121 - 2¹⁵ = 2212021179353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

2212021212121 is a modest number, since divided by 21212121 gives 22120 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2212021215121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1562050 + ... + 2619931.

It is an arithmetic number, because the mean of its divisors is an integer number (86065189560).

Almost surely, 2^{2212021212121} is an apocalyptic number.

It is an amenable number.

2212021212121 is a deficient number, since it is larger than the sum of its proper divisors (542064853799).

2212021212121 is a wasteful number, since it uses less digits than its factorization.

2212021212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182145.

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

Adding to 2212021212121 its reverse (1212121202122), we get a palindrome (3424142414243).

Subtracting from 2212021212121 its reverse (1212121202122), we obtain a palindrome (999900009999).

The spelling of 2212021212121 in words is "two trillion, two hundred twelve billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".