21120001000102 has 32 divisors (see below), whose sum is σ = 34626073515264. Its totient is φ = 9618079795200.

The previous prime is 21120001000073. The next prime is 21120001000121. The reversal of 21120001000102 is 20100010002112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131409352 + ... + 131569972.

It is an arithmetic number, because the mean of its divisors is an integer number (1082064797352).

Almost surely, 2^{21120001000102} is an apocalyptic number.

21120001000102 is a deficient number, since it is larger than the sum of its proper divisors (13506072515162).

21120001000102 is a wasteful number, since it uses less digits than its factorization.

21120001000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285424.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21120001000102 its reverse (20100010002112), we get a palindrome (41220011002214).

The spelling of 21120001000102 in words is "twenty-one trillion, one hundred twenty billion, one million, one hundred two", and thus it is an aban number.