1221111131302 has 4 divisors (see below), whose sum is σ = 1831666696956. Its totient is φ = 610555565650.

The previous prime is 1221111131293. The next prime is 1221111131327. The reversal of 1221111131302 is 2031311111221.

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

It is a super-2 number, since 2×1221111131302² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221111131302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305277782824 + ... + 305277782827.

It is an arithmetic number, because the mean of its divisors is an integer number (457916674239).

Almost surely, 2^{1221111131302} is an apocalyptic number.

1221111131302 is a deficient number, since it is larger than the sum of its proper divisors (610555565654).

1221111131302 is an equidigital number, since it uses as much as digits as its factorization.

1221111131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610555565653.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1221111131302 its reverse (2031311111221), we get a palindrome (3252422242523).

The spelling of 1221111131302 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thirty-one thousand, three hundred two".