21101101121010 has 16 divisors (see below), whose sum is σ = 50642642690496. Its totient is φ = 5626960298928.

The previous prime is 21101101120997. The next prime is 21101101121029. The reversal of 21101101121010 is 1012110110112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351685018654 + ... + 351685018713.

It is an arithmetic number, because the mean of its divisors is an integer number (3165165168156).

Almost surely, 2^{21101101121010} is an apocalyptic number.

21101101121010 is an abundant number, since it is smaller than the sum of its proper divisors (29541541569486).

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

21101101121010 is a wasteful number, since it uses less digits than its factorization.

21101101121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703370037377.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21101101121010 its reverse (1012110110112), we get a palindrome (22113211231122).

The spelling of 21101101121010 in words is "twenty-one trillion, one hundred one billion, one hundred one million, one hundred twenty-one thousand, ten".