121261743426 has 16 divisors (see below), whose sum is σ = 242529251328. Its totient is φ = 40419620400.

The previous prime is 121261743397. The next prime is 121261743439. The reversal of 121261743426 is 624347162121.

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 7 ways as a sum of consecutive naturals, for example, 62656 + ... + 496436.

It is an arithmetic number, because the mean of its divisors is an integer number (15158078208).

Almost surely, 2^121261743426 is an apocalyptic number.

121261743426 is an abundant number, since it is smaller than the sum of its proper divisors (121267507902).

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

121261743426 is a wasteful number, since it uses less digits than its factorization.

121261743426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480377.

The product of its digits is 96768, while the sum is 39.

The spelling of 121261743426 in words is "one hundred twenty-one billion, two hundred sixty-one million, seven hundred forty-three thousand, four hundred twenty-six".