21201100010102 has 8 divisors (see below), whose sum is σ = 33672335310216. Its totient is φ = 9976988240032.

The previous prime is 21201100010059. The next prime is 21201100010117. The reversal of 21201100010102 is 20101000110212.

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, 311780882468 + ... + 311780882535.

It is an arithmetic number, because the mean of its divisors is an integer number (4209041913777).

Almost surely, 2^{21201100010102} is an apocalyptic number.

21201100010102 is a deficient number, since it is larger than the sum of its proper divisors (12471235300114).

21201100010102 is a wasteful number, since it uses less digits than its factorization.

21201100010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623561765022.

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

Adding to 21201100010102 its reverse (20101000110212), we get a palindrome (41302100120314).

The spelling of 21201100010102 in words is "twenty-one trillion, two hundred one billion, one hundred million, ten thousand, one hundred two".