1100121210 has 32 divisors (see below), whose sum is σ = 2933657280. Its totient is φ = 293365584.

The previous prime is 1100121193. The next prime is 1100121229. The reversal of 1100121210 is 121210011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1100121192 and 1100121201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036992 + ... + 2037531.

It is an arithmetic number, because the mean of its divisors is an integer number (91676790).

Almost surely, 2^1100121210 is an apocalyptic number.

1100121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1100121210 is an abundant number, since it is smaller than the sum of its proper divisors (1833536070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1100121210 is a wasteful number, since it uses less digits than its factorization.

1100121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074539 (or 4074533 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1100121210 is about 33168.0751627224. The cubic root of 1100121210 is about 1032.3180300252.

Adding to 1100121210 its reverse (121210011), we get a palindrome (1221331221).

The spelling of 1100121210 in words is "one billion, one hundred million, one hundred twenty-one thousand, two hundred ten".