21112100121010 has 16 divisors (see below), whose sum is σ = 38044623278016. Its totient is φ = 8435319368368.

The previous prime is 21112100120981. The next prime is 21112100121017. The reversal of 21112100121010 is 1012100121112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21112100121017) by changing a digit.

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, 1190075692 + ... + 1190093431.

It is an arithmetic number, because the mean of its divisors is an integer number (2377788954876).

Almost surely, 2^{21112100121010} is an apocalyptic number.

21112100121010 is a deficient number, since it is larger than the sum of its proper divisors (16932523157006).

21112100121010 is a wasteful number, since it uses less digits than its factorization.

21112100121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380170017.

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

Adding to 21112100121010 its reverse (1012100121112), we get a palindrome (22124200242122).

The spelling of 21112100121010 in words is "twenty-one trillion, one hundred twelve billion, one hundred million, one hundred twenty-one thousand, ten".