1131211320123 has 32 divisors (see below), whose sum is σ = 1558469025792. Its totient is φ = 729375494400.

The previous prime is 1131211320121. The next prime is 1131211320163. The reversal of 1131211320123 is 3210231121311.

It is not a de Polignac number, because 1131211320123 - 2¹ = 1131211320121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131211320123.

It is not an unprimeable number, because it can be changed into a prime (1131211320121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20138665 + ... + 20194757.

It is an arithmetic number, because the mean of its divisors is an integer number (48702157056).

Almost surely, 2^{1131211320123} is an apocalyptic number.

1131211320123 is a deficient number, since it is larger than the sum of its proper divisors (427257705669).

1131211320123 is a wasteful number, since it uses less digits than its factorization.

1131211320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57555.

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

Adding to 1131211320123 its reverse (3210231121311), we get a palindrome (4341442441434).

The spelling of 1131211320123 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, three hundred twenty thousand, one hundred twenty-three".