21001101102210 has 64 divisors (see below), whose sum is σ = 53136268883712. Its totient is φ = 5301577814016.

The previous prime is 21001101102203. The next prime is 21001101102259. The reversal of 21001101102210 is 1220110110012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156821619 + ... + 156955478.

It is an arithmetic number, because the mean of its divisors is an integer number (830254201308).

Almost surely, 2^{21001101102210} is an apocalyptic number.

21001101102210 is an abundant number, since it is smaller than the sum of its proper divisors (32135167781502).

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

21001101102210 is a wasteful number, since it uses less digits than its factorization.

21001101102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313777227.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001101102210 its reverse (1220110110012), we get a palindrome (22221211212222).

The spelling of 21001101102210 in words is "twenty-one trillion, one billion, one hundred one million, one hundred two thousand, two hundred ten".