21100101010102 has 8 divisors (see below), whose sum is σ = 31653247520736. Its totient is φ = 10549018503192.

The previous prime is 21100101010081. The next prime is 21100101010169. The reversal of 21100101010102 is 20101010100112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515975373 + ... + 516016264.

It is an arithmetic number, because the mean of its divisors is an integer number (3956655940092).

Almost surely, 2^{21100101010102} is an apocalyptic number.

21100101010102 is a deficient number, since it is larger than the sum of its proper divisors (10553146510634).

21100101010102 is a wasteful number, since it uses less digits than its factorization.

21100101010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032001862.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21100101010102 its reverse (20101010100112), we get a palindrome (41201111110214).

The spelling of 21100101010102 in words is "twenty-one trillion, one hundred billion, one hundred one million, ten thousand, one hundred two".