1201152021 has 16 divisors (see below), whose sum is σ = 1615152000. Its totient is φ = 793974528.

The previous prime is 1201151993. The next prime is 1201152061. The reversal of 1201152021 is 1202511021.

It is not a de Polignac number, because 1201152021 - 2⁹ = 1201151509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201152061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573945 + ... + 576033.

It is an arithmetic number, because the mean of its divisors is an integer number (100947000).

Almost surely, 2^1201152021 is an apocalyptic number.

It is an amenable number.

1201152021 is a deficient number, since it is larger than the sum of its proper divisors (413999979).

1201152021 is a wasteful number, since it uses less digits than its factorization.

1201152021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3628.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1201152021 is about 34657.6401533630. The cubic root of 1201152021 is about 1062.9985173614.

Adding to 1201152021 its reverse (1202511021), we get a palindrome (2403663042).

The spelling of 1201152021 in words is "one billion, two hundred one million, one hundred fifty-two thousand, twenty-one".