21321101102010 has 64 divisors (see below), whose sum is σ = 52557379777152. Its totient is φ = 5531566968576.

The previous prime is 21321101101921. The next prime is 21321101102053. The reversal of 21321101102010 is 1020110112312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15054397 + ... + 16409663.

It is an arithmetic number, because the mean of its divisors is an integer number (821209059018).

Almost surely, 2^{21321101102010} is an apocalyptic number.

21321101102010 is an abundant number, since it is smaller than the sum of its proper divisors (31236278675142).

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

21321101102010 is a wasteful number, since it uses less digits than its factorization.

21321101102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369487.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21321101102010 its reverse (1020110112312), we get a palindrome (22341211214322).

The spelling of 21321101102010 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred one million, one hundred two thousand, ten".