21001102002122 has 16 divisors (see below), whose sum is σ = 34449462734400. Its totient is φ = 9522615707040.

The previous prime is 21001102002113. The next prime is 21001102002143. The reversal of 21001102002122 is 22120020110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001102002097 and 21001102002106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166978222 + ... + 1166996217.

It is an arithmetic number, because the mean of its divisors is an integer number (2153091420900).

Almost surely, 2^{21001102002122} is an apocalyptic number.

21001102002122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001102002122 is a deficient number, since it is larger than the sum of its proper divisors (13448360732278).

21001102002122 is a wasteful number, since it uses less digits than its factorization.

21001102002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333974861.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001102002122 its reverse (22120020110012), we get a palindrome (43121122112134).

The spelling of 21001102002122 in words is "twenty-one trillion, one billion, one hundred two million, two thousand, one hundred twenty-two".