2121011221222 has 64 divisors (see below), whose sum is σ = 3479552778240. Its totient is φ = 966267338400.

The previous prime is 2121011221157. The next prime is 2121011221249. The reversal of 2121011221222 is 2221221101212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2121011221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94076083 + ... + 94098625.

It is an arithmetic number, because the mean of its divisors is an integer number (54368012160).

Almost surely, 2^{2121011221222} is an apocalyptic number.

2121011221222 is a deficient number, since it is larger than the sum of its proper divisors (1358541557018).

2121011221222 is a wasteful number, since it uses less digits than its factorization.

2121011221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23489.

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

Adding to 2121011221222 its reverse (2221221101212), we get a palindrome (4342232322434).

The spelling of 2121011221222 in words is "two trillion, one hundred twenty-one billion, eleven million, two hundred twenty-one thousand, two hundred twenty-two".