12121121222040 has 32 divisors (see below), whose sum is σ = 36363363666480. Its totient is φ = 3232298992512.

The previous prime is 12121121222003. The next prime is 12121121222069. The reversal of 12121121222040 is 4022212112121.

It is a junction number, because it is equal to n+sod(n) for n = 12121121221998 and 12121121222016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50504671639 + ... + 50504671878.

Almost surely, 2^{12121121222040} is an apocalyptic number.

12121121222040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121121222040 is an abundant number, since it is smaller than the sum of its proper divisors (24242242444440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121121222040 is a wasteful number, since it uses less digits than its factorization.

12121121222040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101009343531 (or 101009343527 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12121121222040 its reverse (4022212112121), we get a palindrome (16143333334161).

The spelling of 12121121222040 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, forty".