21101012222022 has 16 divisors (see below), whose sum is σ = 46891138271280. Its totient is φ = 7033670740656.

The previous prime is 21101012222009. The next prime is 21101012222029. The reversal of 21101012222022 is 22022221010112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21101012221986 and 21101012222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101012222029) 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 7 ways as a sum of consecutive naturals, for example, 195379742743 + ... + 195379742850.

It is an arithmetic number, because the mean of its divisors is an integer number (2930696141955).

Almost surely, 2^{21101012222022} is an apocalyptic number.

21101012222022 is an abundant number, since it is smaller than the sum of its proper divisors (25790126049258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101012222022 is a wasteful number, since it uses less digits than its factorization.

21101012222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390759485604 (or 390759485598 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21101012222022 its reverse (22022221010112), we get a palindrome (43123233232134).

The spelling of 21101012222022 in words is "twenty-one trillion, one hundred one billion, twelve million, two hundred twenty-two thousand, twenty-two".