1200232021 has 2 divisors, whose sum is σ = 1200232022. Its totient is φ = 1200232020.

The previous prime is 1200232013. The next prime is 1200232031. The reversal of 1200232021 is 1202320021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 875331396 + 324900625 = 29586^2 + 18025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200232021 - 2³ = 1200232013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200231992 and 1200232010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200232031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600116010 + 600116011.

It is an arithmetic number, because the mean of its divisors is an integer number (600116011).

Almost surely, 2^1200232021 is an apocalyptic number.

It is an amenable number.

1200232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200232021 is an equidigital number, since it uses as much as digits as its factorization.

1200232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1200232021 is about 34644.3649241836. The cubic root of 1200232021 is about 1062.7270534089.

Adding to 1200232021 its reverse (1202320021), we get a palindrome (2402552042).

The spelling of 1200232021 in words is "one billion, two hundred million, two hundred thirty-two thousand, twenty-one".