21020212110110 has 48 divisors (see below), whose sum is σ = 38252168519184. Its totient is φ = 8316680398848.

The previous prime is 21020212110091. The next prime is 21020212110133. The reversal of 21020212110110 is 1101121202012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168076322 + ... + 168201338.

It is an arithmetic number, because the mean of its divisors is an integer number (796920177483).

Almost surely, 2^{21020212110110} is an apocalyptic number.

21020212110110 is a deficient number, since it is larger than the sum of its proper divisors (17231956409074).

21020212110110 is a wasteful number, since it uses less digits than its factorization.

21020212110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127005 (or 126908 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21020212110110 its reverse (1101121202012), we get a palindrome (22121333312122).

The spelling of 21020212110110 in words is "twenty-one trillion, twenty billion, two hundred twelve million, one hundred ten thousand, one hundred ten".