2021200121222 has 4 divisors (see below), whose sum is σ = 3031800181836. Its totient is φ = 1010600060610.

The previous prime is 2021200121201. The next prime is 2021200121249. The reversal of 2021200121222 is 2221210021202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2021200121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505300030304 + ... + 505300030307.

It is an arithmetic number, because the mean of its divisors is an integer number (757950045459).

Almost surely, 2^{2021200121222} is an apocalyptic number.

2021200121222 is a deficient number, since it is larger than the sum of its proper divisors (1010600060614).

2021200121222 is a wasteful number, since it uses less digits than its factorization.

2021200121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010600060613.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2021200121222 its reverse (2221210021202), we get a palindrome (4242410142424).

The spelling of 2021200121222 in words is "two trillion, twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-two".