1101221010 has 48 divisors (see below), whose sum is σ = 2940566616. Its totient is φ = 285721344.

The previous prime is 1101221003. The next prime is 1101221021. The reversal of 1101221010 is 101221011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 954253881 + 146967129 = 30891^2 + 12123^2 .

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 = 1101220983 and 1101221001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162019 + ... + 168678.

Almost surely, 2^1101221010 is an apocalyptic number.

1101221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1101221010 is an abundant number, since it is smaller than the sum of its proper divisors (1839345606).

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

1101221010 is a wasteful number, since it uses less digits than its factorization.

1101221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330747 (or 330744 counting only the distinct ones).

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

The square root of 1101221010 is about 33184.6502166288. The cubic root of 1101221010 is about 1032.6619209928.

Adding to 1101221010 its reverse (101221011), we get a palindrome (1202442021).

Subtracting from 1101221010 its reverse (101221011), we obtain a palindrome (999999999).

It can be divided in two parts, 1101 and 221010, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 1101221010 in words is "one billion, one hundred one million, two hundred twenty-one thousand, ten".