1200117021 has 8 divisors (see below), whose sum is σ = 1602166944. Its totient is φ = 799072560.

The previous prime is 1200117019. The next prime is 1200117031. The reversal of 1200117021 is 1207110021.

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

It is not a de Polignac number, because 1200117021 - 2¹ = 1200117019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200117031) 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, 248575 + ... + 253356.

It is an arithmetic number, because the mean of its divisors is an integer number (200270868).

Almost surely, 2^1200117021 is an apocalyptic number.

It is an amenable number.

1200117021 is a deficient number, since it is larger than the sum of its proper divisors (402049923).

1200117021 is an equidigital number, since it uses as much as digits as its factorization.

1200117021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502731.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 1200117021 is about 34642.7051628478. The cubic root of 1200117021 is about 1062.6931106622.

Adding to 1200117021 its reverse (1207110021), we get a palindrome (2407227042).

The spelling of 1200117021 in words is "one billion, two hundred million, one hundred seventeen thousand, twenty-one".