1202030021 has 4 divisors (see below), whose sum is σ = 1202323200. Its totient is φ = 1201736844.

The previous prime is 1202030017. The next prime is 1202030051. The reversal of 1202030021 is 1200302021.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200302021 = 1327 ⋅904523.

It is a cyclic number.

It is not a de Polignac number, because 1202030021 - 2² = 1202030017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202029984 and 1202030011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202030051) 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, 140351 + ... + 148668.

It is an arithmetic number, because the mean of its divisors is an integer number (300580800).

Almost surely, 2^1202030021 is an apocalyptic number.

It is an amenable number.

1202030021 is a deficient number, since it is larger than the sum of its proper divisors (293179).

1202030021 is an equidigital number, since it uses as much as digits as its factorization.

1202030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293178.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1202030021 is about 34670.3045991811. The cubic root of 1202030021 is about 1063.2574591572.

Adding to 1202030021 its reverse (1200302021), we get a palindrome (2402332042).

Subtracting from 1202030021 its reverse (1200302021), we obtain a cube (1728000 = 120³).

The spelling of 1202030021 in words is "one billion, two hundred two million, thirty thousand, twenty-one".