121131221122 has 16 divisors (see below), whose sum is σ = 182491853112. Its totient is φ = 60301169280.

The previous prime is 121131221083. The next prime is 121131221147. The reversal of 121131221122 is 221122131121.

It can be written as a sum of positive squares in 4 ways, for example, as 118804991761 + 2326229361 = 344681^2 + 48231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121131221122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288558 + ... + 570550.

Almost surely, 2^121131221122 is an apocalyptic number.

121131221122 is a deficient number, since it is larger than the sum of its proper divisors (61360631990).

121131221122 is a wasteful number, since it uses less digits than its factorization.

121131221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282933.

The product of its digits is 96, while the sum is 19.

Adding to 121131221122 its reverse (221122131121), we get a palindrome (342253352243).

Subtracting 121131221122 from its reverse (221122131121), we obtain a palindrome (99990909999).

It can be divided in two parts, 12113 and 1221122, that added together give a triangular number (1233235 = T₁₅₇₀).

The spelling of 121131221122 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".