1100001221010 has 48 divisors (see below), whose sum is σ = 2937300566616. Its totient is φ = 285405721344.

The previous prime is 1100001220963. The next prime is 1100001221017. The reversal of 1100001221010 is 101221000011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1026596530521 + 73404690489 = 1013211^2 + 270933^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1100001220983 and 1100001221001.

It is not an unprimeable number, because it can be changed into a prime (1100001221017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165162019 + ... + 165168678.

Almost surely, 2^{1100001221010} is an apocalyptic number.

1100001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1100001221010 is an abundant number, since it is smaller than the sum of its proper divisors (1837299345606).

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

1100001221010 is a wasteful number, since it uses less digits than its factorization.

1100001221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330330747 (or 330330744 counting only the distinct ones).

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

Adding to 1100001221010 its reverse (101221000011), we get a palindrome (1201222221021).

The spelling of 1100001221010 in words is "one trillion, one hundred billion, one million, two hundred twenty-one thousand, ten".