21001101100210 has 192 divisors, whose sum is σ = 48548197345536. Its totient is φ = 6400332956160.

The previous prime is 21001101100183. The next prime is 21001101100247. The reversal of 21001101100210 is 1200110110012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 131450797 + ... + 131610463.

It is an arithmetic number, because the mean of its divisors is an integer number (252855194508).

Almost surely, 2^{21001101100210} is an apocalyptic number.

21001101100210 is an abundant number, since it is smaller than the sum of its proper divisors (27547096245326).

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

21001101100210 is a wasteful number, since it uses less digits than its factorization.

21001101100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160049 (or 160038 counting only the distinct ones).

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

Adding to 21001101100210 its reverse (1200110110012), we get a palindrome (22201211210222).

The spelling of 21001101100210 in words is "twenty-one trillion, one billion, one hundred one million, one hundred thousand, two hundred ten".