21121020000102 has 32 divisors (see below), whose sum is σ = 46538485127424. Its totient is φ = 6336939692000.

The previous prime is 21121020000071. The next prime is 21121020000103. The reversal of 21121020000102 is 20100002012112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121020000103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1584228258 + ... + 1584241589.

It is an arithmetic number, because the mean of its divisors is an integer number (1454327660232).

Almost surely, 2^{21121020000102} is an apocalyptic number.

21121020000102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121020000102 is an abundant number, since it is smaller than the sum of its proper divisors (25417465127322).

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

21121020000102 is a wasteful number, since it uses less digits than its factorization.

21121020000102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168469964.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21121020000102 its reverse (20100002012112), we get a palindrome (41221022012214).

The spelling of 21121020000102 in words is "twenty-one trillion, one hundred twenty-one billion, twenty million, one hundred two", and thus it is an aban number.