21121012200102 has 16 divisors (see below), whose sum is σ = 44465288842560. Its totient is φ = 6669793326312.

The previous prime is 21121012200091. The next prime is 21121012200139. The reversal of 21121012200102 is 20100221012112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92636018308 + ... + 92636018535.

It is an arithmetic number, because the mean of its divisors is an integer number (2779080552660).

Almost surely, 2^{21121012200102} is an apocalyptic number.

21121012200102 is an abundant number, since it is smaller than the sum of its proper divisors (23344276642458).

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

21121012200102 is a wasteful number, since it uses less digits than its factorization.

21121012200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185272036867.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121012200102 its reverse (20100221012112), we get a palindrome (41221233212214).

The spelling of 21121012200102 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, two hundred thousand, one hundred two".