1220041000 has 32 divisors (see below), whose sum is σ = 2854898280. Its totient is φ = 488016000.

The previous prime is 1220040979. The next prime is 1220041001. The reversal of 1220041000 is 1400221.

It can be written as a sum of positive squares in 4 ways, for example, as 788149476 + 431891524 = 28074^2 + 20782^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1220041001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609021 + ... + 611020.

Almost surely, 2^1220041000 is an apocalyptic number.

1220041000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220041000 is an abundant number, since it is smaller than the sum of its proper divisors (1634857280).

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

1220041000 is a wasteful number, since it uses less digits than its factorization.

1220041000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220062 (or 1220048 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1220041000 is about 34929.0853015077. The cubic root of 1220041000 is about 1068.5416998834.

Adding to 1220041000 its reverse (1400221), we get a palindrome (1221441221).

The spelling of 1220041000 in words is "one billion, two hundred twenty million, forty-one thousand".