21201121222022 has 32 divisors (see below), whose sum is σ = 38499895848960. Its totient is φ = 8547893112960.

The previous prime is 21201121222019. The next prime is 21201121222031. The reversal of 21201121222022 is 22022212110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201121221985 and 21201121222003.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19360004 + ... + 20425767.

It is an arithmetic number, because the mean of its divisors is an integer number (1203121745280).

Almost surely, 2^{21201121222022} is an apocalyptic number.

21201121222022 is a deficient number, since it is larger than the sum of its proper divisors (17298774626938).

21201121222022 is a wasteful number, since it uses less digits than its factorization.

21201121222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39788036.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21201121222022 its reverse (22022212110212), we get a palindrome (43223333332234).

The spelling of 21201121222022 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-two".