1121221010 has 64 divisors (see below), whose sum is σ = 2491195392. Its totient is φ = 353811456.

The previous prime is 1121220967. The next prime is 1121221019. The reversal of 1121221010 is 101221211.

It is a junction number, because it is equal to n+sod(n) for n = 1121220982 and 1121221000.

It is not an unprimeable number, because it can be changed into a prime (1121221019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346922 + ... + 350138.

It is an arithmetic number, because the mean of its divisors is an integer number (38924928).

Almost surely, 2^1121221010 is an apocalyptic number.

1121221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121221010 is an abundant number, since it is smaller than the sum of its proper divisors (1369974382).

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

1121221010 is a wasteful number, since it uses less digits than its factorization.

1121221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627.

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

The square root of 1121221010 is about 33484.6384182359. The cubic root of 1121221010 is about 1038.8760694569.

Adding to 1121221010 its reverse (101221211), we get a palindrome (1222442221).

The spelling of 1121221010 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, ten".