121122121012 has 24 divisors (see below), whose sum is σ = 214959717000. Its totient is φ = 59708960256.

The previous prime is 121122120997. The next prime is 121122121019. The reversal of 121122121012 is 210121221121.

It can be written as a sum of positive squares in 4 ways, for example, as 24336 + 121122096676 = 156^2 + 348026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122121019) 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, 363193 + ... + 611680.

It is an arithmetic number, because the mean of its divisors is an integer number (8956654875).

Almost surely, 2^121122121012 is an apocalyptic number.

It is an amenable number.

121122121012 is a deficient number, since it is larger than the sum of its proper divisors (93837595988).

121122121012 is a wasteful number, since it uses less digits than its factorization.

121122121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975315 (or 975313 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121122121012 its reverse (210121221121), we get a palindrome (331243342133).

The spelling of 121122121012 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, twelve".