21100101201010 has 32 divisors (see below), whose sum is σ = 40907757507120. Its totient is φ = 7789659383808.

The previous prime is 21100101200987. The next prime is 21100101201041. The reversal of 21100101201010 is 1010210100112.

It can be written as a sum of positive squares in 8 ways, for example, as 15134166441 + 21084967034569 = 123021^2 + 4591837^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11063655 + ... + 12829834.

Almost surely, 2^{21100101201010} is an apocalyptic number.

21100101201010 is a deficient number, since it is larger than the sum of its proper divisors (19807656306110).

21100101201010 is a wasteful number, since it uses less digits than its factorization.

21100101201010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23900302.

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

Adding to 21100101201010 its reverse (1010210100112), we get a palindrome (22110311301122).

The spelling of 21100101201010 in words is "twenty-one trillion, one hundred billion, one hundred one million, two hundred one thousand, ten".