21011121100102 has 96 divisors (see below), whose sum is σ = 39410161210368. Its totient is φ = 8346954921984.

The previous prime is 21011121100087. The next prime is 21011121100141. The reversal of 21011121100102 is 20100112111012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28624308 + ... + 29349160.

It is an arithmetic number, because the mean of its divisors is an integer number (410522512608).

Almost surely, 2^{21011121100102} is an apocalyptic number.

21011121100102 is a deficient number, since it is larger than the sum of its proper divisors (18399040110266).

21011121100102 is a wasteful number, since it uses less digits than its factorization.

21011121100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725150 (or 725143 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21011121100102 its reverse (20100112111012), we get a palindrome (41111233211114).

The spelling of 21011121100102 in words is "twenty-one trillion, eleven billion, one hundred twenty-one million, one hundred thousand, one hundred two".