1211020323 has 8 divisors (see below), whose sum is σ = 1658334288. Its totient is φ = 785526624.

The previous prime is 1211020303. The next prime is 1211020331. The reversal of 1211020323 is 3230201121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211020323 - 2⁶ = 1211020259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211020303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5454936 + ... + 5455157.

It is an arithmetic number, because the mean of its divisors is an integer number (207291786).

Almost surely, 2^1211020323 is an apocalyptic number.

1211020323 is a deficient number, since it is larger than the sum of its proper divisors (447313965).

1211020323 is a wasteful number, since it uses less digits than its factorization.

1211020323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910133.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1211020323 is about 34799.7172833344. The cubic root of 1211020323 is about 1065.9016728566.

Adding to 1211020323 its reverse (3230201121), we get a palindrome (4441221444).

The spelling of 1211020323 in words is "one billion, two hundred eleven million, twenty thousand, three hundred twenty-three".