1011421200 has 240 divisors, whose sum is σ = 3365498880. Its totient is φ = 259484160.

The previous prime is 1011421193. The next prime is 1011421223. The reversal of 1011421200 is 21241101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4455487 + ... + 4455713.

It is an arithmetic number, because the mean of its divisors is an integer number (14022912).

Almost surely, 2^1011421200 is an apocalyptic number.

1011421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1682749440).

1011421200 is an abundant number, since it is smaller than the sum of its proper divisors (2354077680).

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

1011421200 is a wasteful number, since it uses less digits than its factorization.

1011421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1011421200 is about 31802.8489289875. The cubic root of 1011421200 is about 1003.7926641801.

Adding to 1011421200 its reverse (21241101), we get a palindrome (1032662301).

The spelling of 1011421200 in words is "one billion, eleven million, four hundred twenty-one thousand, two hundred".