2101221110 has 16 divisors (see below), whose sum is σ = 3783434400. Its totient is φ = 840213696.

The previous prime is 2101221107. The next prime is 2101221127. The reversal of 2101221110 is 111221012.

It is a super-3 number, since 3×2101221110³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101221091 and 2101221100.

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, 650 + ... + 64829.

It is an arithmetic number, because the mean of its divisors is an integer number (236464650).

Almost surely, 2^2101221110 is an apocalyptic number.

2101221110 is a deficient number, since it is larger than the sum of its proper divisors (1682213290).

2101221110 is a wasteful number, since it uses less digits than its factorization.

2101221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68695.

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

The square root of 2101221110 is about 45839.0784156924. The cubic root of 2101221110 is about 1280.8273276906.

Adding to 2101221110 its reverse (111221012), we get a palindrome (2212442122).

The spelling of 2101221110 in words is "two billion, one hundred one million, two hundred twenty-one thousand, one hundred ten".