21101202002122 has 16 divisors (see below), whose sum is σ = 35263904314752. Its totient is φ = 9387381934720.

The previous prime is 21101202002119. The next prime is 21101202002137. The reversal of 21101202002122 is 22120020210112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21101202002096 and 21101202002105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10203674983 + ... + 10203677050.

It is an arithmetic number, because the mean of its divisors is an integer number (2203994019672).

Almost surely, 2^{21101202002122} is an apocalyptic number.

21101202002122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101202002122 is a deficient number, since it is larger than the sum of its proper divisors (14162702312630).

21101202002122 is a wasteful number, since it uses less digits than its factorization.

21101202002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407352093.

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

Adding to 21101202002122 its reverse (22120020210112), we get a palindrome (43221222212234).

The spelling of 21101202002122 in words is "twenty-one trillion, one hundred one billion, two hundred two million, two thousand, one hundred twenty-two".