21120120111010 has 32 divisors (see below), whose sum is σ = 40308448400640. Its totient is φ = 7940045436672.

The previous prime is 21120120110987. The next prime is 21120120111023. The reversal of 21120120111010 is 1011102102112.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 86272764 + ... + 86517223.

It is an arithmetic number, because the mean of its divisors is an integer number (1259639012520).

Almost surely, 2^{21120120111010} is an apocalyptic number.

21120120111010 is a deficient number, since it is larger than the sum of its proper divisors (19188328289630).

21120120111010 is a wasteful number, since it uses less digits than its factorization.

21120120111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172790730.

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

Adding to 21120120111010 its reverse (1011102102112), we get a palindrome (22131222213122).

The spelling of 21120120111010 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, one hundred eleven thousand, ten".