21122122222102 has 8 divisors (see below), whose sum is σ = 34563472727112. Its totient is φ = 9600964646400.

The previous prime is 21122122222087. The next prime is 21122122222109. The reversal of 21122122222102 is 20122222122112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122122222102² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 960096464641 = 21122122222102 / (2 + 1 + 1 + 2 + 2 + 1 + 2 + 2 + 2 + 2 + 2 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122122222109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480048232299 + ... + 480048232342.

It is an arithmetic number, because the mean of its divisors is an integer number (4320434090889).

Almost surely, 2^{21122122222102} is an apocalyptic number.

21122122222102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122122222102 is a deficient number, since it is larger than the sum of its proper divisors (13441350505010).

21122122222102 is a wasteful number, since it uses less digits than its factorization.

21122122222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960096464654.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122122222102 its reverse (20122222122112), we get a palindrome (41244344344214).

The spelling of 21122122222102 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred two".