21101011212010 has 16 divisors (see below), whose sum is σ = 37981886985000. Its totient is φ = 8440389639616.

The previous prime is 21101011211981. The next prime is 21101011212049. The reversal of 21101011212010 is 1021211010112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10684183956889 + 10416827255121 = 3268667^2 + 3227511^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5504316 + ... + 8514664.

Almost surely, 2^{21101011212010} is an apocalyptic number.

21101011212010 is a deficient number, since it is larger than the sum of its proper divisors (16880875772990).

21101011212010 is a wasteful number, since it uses less digits than its factorization.

21101011212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711305.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21101011212010 its reverse (1021211010112), we get a palindrome (22122222222122).

The spelling of 21101011212010 in words is "twenty-one trillion, one hundred one billion, eleven million, two hundred twelve thousand, ten".