1200053021 has 8 divisors (see below), whose sum is σ = 1233709824. Its totient is φ = 1166734800.

The previous prime is 1200053017. The next prime is 1200053027. The reversal of 1200053021 is 1203500021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200053021 - 2² = 1200053017 is a prime.

It is a super-2 number, since 2×1200053021² = 2880254506422452882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200052987 and 1200053005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200053027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77450 + ... + 91643.

It is an arithmetic number, because the mean of its divisors is an integer number (154213728).

Almost surely, 2^1200053021 is an apocalyptic number.

It is an amenable number.

1200053021 is a deficient number, since it is larger than the sum of its proper divisors (33656803).

1200053021 is a wasteful number, since it uses less digits than its factorization.

1200053021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169291.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1200053021 is about 34641.7814351399. The cubic root of 1200053021 is about 1062.6742198466.

Adding to 1200053021 its reverse (1203500021), we get a palindrome (2403553042).

The spelling of 1200053021 in words is "one billion, two hundred million, fifty-three thousand, twenty-one".