21111202222022 has 64 divisors (see below), whose sum is σ = 35116764675840. Its totient is φ = 9438784924800.

The previous prime is 21111202222013. The next prime is 21111202222027. The reversal of 21111202222022 is 22022220211112.

It is a junction number, because it is equal to n+sod(n) for n = 21111202221985 and 21111202222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111202222027) 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, 278485028 + ... + 278560824.

It is an arithmetic number, because the mean of its divisors is an integer number (548699448060).

Almost surely, 2^{21111202222022} is an apocalyptic number.

21111202222022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21111202222022 is a deficient number, since it is larger than the sum of its proper divisors (14005562453818).

21111202222022 is a wasteful number, since it uses less digits than its factorization.

21111202222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76757.

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

Adding to 21111202222022 its reverse (22022220211112), we get a palindrome (43133422433134).

The spelling of 21111202222022 in words is "twenty-one trillion, one hundred eleven billion, two hundred two million, two hundred twenty-two thousand, twenty-two".