121121420212 has 12 divisors (see below), whose sum is σ = 228267292036. Its totient is φ = 55902193920.

The previous prime is 121121420143. The next prime is 121121420219. The reversal of 121121420212 is 212024121121.

It can be written as a sum of positive squares in 2 ways, for example, as 51254243236 + 69867176976 = 226394^2 + 264324^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121121420212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121420219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164628989 + ... + 1164629092.

Almost surely, 2^121121420212 is an apocalyptic number.

It is an amenable number.

121121420212 is a deficient number, since it is larger than the sum of its proper divisors (107145871824).

121121420212 is a wasteful number, since it uses less digits than its factorization.

121121420212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329258098 (or 2329258096 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121121420212 its reverse (212024121121), we get a palindrome (333145541333).

The spelling of 121121420212 in words is "one hundred twenty-one billion, one hundred twenty-one million, four hundred twenty thousand, two hundred twelve".