21011211120110 has 16 divisors (see below), whose sum is σ = 37954771409232. Its totient is φ = 8374575249600.

The previous prime is 21011211120091. The next prime is 21011211120127. The reversal of 21011211120110 is 1102111211012.

It is a Curzon number.

It is a congruent number.

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, 3738646856 + ... + 3738652475.

It is an arithmetic number, because the mean of its divisors is an integer number (2372173213077).

Almost surely, 2^{21011211120110} is an apocalyptic number.

21011211120110 is a deficient number, since it is larger than the sum of its proper divisors (16943560289122).

21011211120110 is a wasteful number, since it uses less digits than its factorization.

21011211120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477299619.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21011211120110 its reverse (1102111211012), we get a palindrome (22113322331122).

The spelling of 21011211120110 in words is "twenty-one trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred ten".