21010012100102 has 8 divisors (see below), whose sum is σ = 31524045665112. Its totient is φ = 10501996878400.

The previous prime is 21010012100101. The next prime is 21010012100107. The reversal of 21010012100102 is 20100121001012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010012100101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504577099 + ... + 1504591062.

It is an arithmetic number, because the mean of its divisors is an integer number (3940505708139).

Almost surely, 2^{21010012100102} is an apocalyptic number.

21010012100102 is a deficient number, since it is larger than the sum of its proper divisors (10514033565010).

21010012100102 is a wasteful number, since it uses less digits than its factorization.

21010012100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009171654.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010012100102 its reverse (20100121001012), we get a palindrome (41110133101114).

The spelling of 21010012100102 in words is "twenty-one trillion, ten billion, twelve million, one hundred thousand, one hundred two".