1131123301221 has 16 divisors (see below), whose sum is σ = 1549096586624. Its totient is φ = 733620608064.

The previous prime is 1131123301201. The next prime is 1131123301291. The reversal of 1131123301221 is 1221033211311.

It is not a de Polignac number, because 1131123301221 - 2¹⁸ = 1131123039077 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 (1131123301201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455880 + ... + 1571646.

It is an arithmetic number, because the mean of its divisors is an integer number (96818536664).

Almost surely, 2^{1131123301221} is an apocalyptic number.

It is an amenable number.

1131123301221 is a deficient number, since it is larger than the sum of its proper divisors (417973285403).

1131123301221 is a wasteful number, since it uses less digits than its factorization.

1131123301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124940.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1131123301221 its reverse (1221033211311), we get a palindrome (2352156512532).

The spelling of 1131123301221 in words is "one trillion, one hundred thirty-one billion, one hundred twenty-three million, three hundred one thousand, two hundred twenty-one".