1221031230311 has 8 divisors (see below), whose sum is σ = 1233947246400. Its totient is φ = 1208146376160.

The previous prime is 1221031230301. The next prime is 1221031230337. The reversal of 1221031230311 is 1130321301221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1221031230311 - 2²² = 1221027036007 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 (1221031230301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7711700 + ... + 7868441.

It is an arithmetic number, because the mean of its divisors is an integer number (154243405800).

Almost surely, 2^{1221031230311} is an apocalyptic number.

1221031230311 is a deficient number, since it is larger than the sum of its proper divisors (12916016089).

1221031230311 is a wasteful number, since it uses less digits than its factorization.

1221031230311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15580969.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221031230311 its reverse (1130321301221), we get a palindrome (2351352531532).

The spelling of 1221031230311 in words is "one trillion, two hundred twenty-one billion, thirty-one million, two hundred thirty thousand, three hundred eleven".