1021200133 has 4 divisors (see below), whose sum is σ = 1025699040. Its totient is φ = 1016701228.

The previous prime is 1021200119. The next prime is 1021200197. The reversal of 1021200133 is 3310021201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021200133 - 2⁵ = 1021200101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021200833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249113 + ... + 2249566.

It is an arithmetic number, because the mean of its divisors is an integer number (256424760).

Almost surely, 2^1021200133 is an apocalyptic number.

It is an amenable number.

1021200133 is a deficient number, since it is larger than the sum of its proper divisors (4498907).

1021200133 is an equidigital number, since it uses as much as digits as its factorization.

1021200133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498906.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1021200133 is about 31956.2221327866. Note that the first 3 decimals coincide. The cubic root of 1021200133 is about 1007.0173525771.

Adding to 1021200133 its reverse (3310021201), we get a palindrome (4331221334).

The spelling of 1021200133 in words is "one billion, twenty-one million, two hundred thousand, one hundred thirty-three".