21001101102010 has 16 divisors (see below), whose sum is σ = 37802123521056. Its totient is φ = 8400408988048.

The previous prime is 21001101101983. The next prime is 21001101102019. The reversal of 21001101102010 is 1020110110012.

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

It is not an unprimeable number, because it can be changed into a prime (21001101102019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024912 + ... + 6561451.

It is an arithmetic number, because the mean of its divisors is an integer number (2362632720066).

Almost surely, 2^{21001101102010} is an apocalyptic number.

21001101102010 is a deficient number, since it is larger than the sum of its proper divisors (16801022419046).

21001101102010 is a wasteful number, since it uses less digits than its factorization.

21001101102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7863197.

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

Adding to 21001101102010 its reverse (1020110110012), we get a palindrome (22021211212022).

The spelling of 21001101102010 in words is "twenty-one trillion, one billion, one hundred one million, one hundred two thousand, ten".