121222967640 has 64 divisors (see below), whose sum is σ = 363693715200. Its totient is φ = 32323919232.

The previous prime is 121222967639. The next prime is 121222967707. The reversal of 121222967640 is 46769222121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121222967592 and 121222967601.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2513271 + ... + 2561049.

It is an arithmetic number, because the mean of its divisors is an integer number (5682714300).

Almost surely, 2^121222967640 is an apocalyptic number.

121222967640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222967640 is an abundant number, since it is smaller than the sum of its proper divisors (242470747560).

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

121222967640 is a wasteful number, since it uses less digits than its factorization.

121222967640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68936 (or 68932 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 121222967640 in words is "one hundred twenty-one billion, two hundred twenty-two million, nine hundred sixty-seven thousand, six hundred forty".