21100201090050 has 48 divisors (see below), whose sum is σ = 53215422432480. Its totient is φ = 5531352147840.

The previous prime is 21100201090049. The next prime is 21100201090079. The reversal of 21100201090050 is 5009010200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100201089999 and 21100201090026.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1192092907 + ... + 1192110606.

It is an arithmetic number, because the mean of its divisors is an integer number (1108654634010).

Almost surely, 2^{21100201090050} is an apocalyptic number.

21100201090050 is an abundant number, since it is smaller than the sum of its proper divisors (32115221342430).

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

21100201090050 is a wasteful number, since it uses less digits than its factorization.

21100201090050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384203587 (or 2384203582 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 21100201090050 its reverse (5009010200112), we get a palindrome (26109211290162).

The spelling of 21100201090050 in words is "twenty-one trillion, one hundred billion, two hundred one million, ninety thousand, fifty".