2021121110 has 16 divisors (see below), whose sum is σ = 3699680400. Its totient is φ = 794745696.

The previous prime is 2021121107. The next prime is 2021121139. The reversal of 2021121110 is 111211202.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021121091 and 2021121100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712225 + ... + 1713404.

It is an arithmetic number, because the mean of its divisors is an integer number (231230025).

Almost surely, 2^2021121110 is an apocalyptic number.

2021121110 is a deficient number, since it is larger than the sum of its proper divisors (1678559290).

2021121110 is a wasteful number, since it uses less digits than its factorization.

2021121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425695.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2021121110 is about 44956.8805634911. The cubic root of 2021121110 is about 1264.3406834678.

Adding to 2021121110 its reverse (111211202), we get a palindrome (2132332312).

The spelling of 2021121110 in words is "two billion, twenty-one million, one hundred twenty-one thousand, one hundred ten".