21112220120002 has 24 divisors (see below), whose sum is σ = 35297956976400. Its totient is φ = 9392283590760.

The previous prime is 21112220119987. The next prime is 21112220120003. The reversal of 21112220120002 is 20002102221112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21112220120003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217164252 + ... + 217261447.

It is an arithmetic number, because the mean of its divisors is an integer number (1470748207350).

Almost surely, 2^{21112220120002} is an apocalyptic number.

21112220120002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112220120002 is a deficient number, since it is larger than the sum of its proper divisors (14185736856398).

21112220120002 is a wasteful number, since it uses less digits than its factorization.

21112220120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434425806 (or 434425759 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112220120002 its reverse (20002102221112), we get a palindrome (41114322341114).

The spelling of 21112220120002 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, one hundred twenty thousand, two".