21121110200001 has 32 divisors (see below), whose sum is σ = 32230462076928. Its totient is φ = 12051999083520.

The previous prime is 21121110199909. The next prime is 21121110200009. The reversal of 21121110200001 is 10000201112112.

It is not a de Polignac number, because 21121110200001 - 2⁹ = 21121110199489 is a prime.

It is a super-2 number, since 2×21121110200001² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121110200001.

It is not an unprimeable number, because it can be changed into a prime (21121110200009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47475745 + ... + 47918561.

It is an arithmetic number, because the mean of its divisors is an integer number (1007201939904).

Almost surely, 2^{21121110200001} is an apocalyptic number.

21121110200001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21121110200001 is a deficient number, since it is larger than the sum of its proper divisors (11109351876927).

21121110200001 is a wasteful number, since it uses less digits than its factorization.

21121110200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446061.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21121110200001 its reverse (10000201112112), we get a palindrome (31121311312113).

The spelling of 21121110200001 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred thousand, one".