1202140321 has 4 divisors (see below), whose sum is σ = 1203305092. Its totient is φ = 1200975552.

The previous prime is 1202140319. The next prime is 1202140327. The reversal of 1202140321 is 1230412021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 522808225 + 679332096 = 22865^2 + 26064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202140321 - 2¹ = 1202140319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202140295 and 1202140304.

It is not an unprimeable number, because it can be changed into a prime (1202140327) 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, 580836 + ... + 582901.

It is an arithmetic number, because the mean of its divisors is an integer number (300826273).

Almost surely, 2^1202140321 is an apocalyptic number.

It is an amenable number.

1202140321 is a deficient number, since it is larger than the sum of its proper divisors (1164771).

1202140321 is a wasteful number, since it uses less digits than its factorization.

1202140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164770.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1202140321 is about 34671.8952611478. The cubic root of 1202140321 is about 1063.2899801727.

Adding to 1202140321 its reverse (1230412021), we get a palindrome (2432552342).

The spelling of 1202140321 in words is "one billion, two hundred two million, one hundred forty thousand, three hundred twenty-one".