121851426402 has 24 divisors (see below), whose sum is σ = 267951895536. Its totient is φ = 40010915736.

The previous prime is 121851426377. The next prime is 121851426407. The reversal of 121851426402 is 204624158121.

121851426402 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 5 + 1 + 4 + 2 + 640 + 2 = 666.

121851426402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (121851426407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50517628 + ... + 50520039.

It is an arithmetic number, because the mean of its divisors is an integer number (11164662314).

Almost surely, 2^121851426402 is an apocalyptic number.

121851426402 is an abundant number, since it is smaller than the sum of its proper divisors (146100469134).

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

121851426402 is a wasteful number, since it uses less digits than its factorization.

121851426402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101037742 (or 101037739 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 121851426402 in words is "one hundred twenty-one billion, eight hundred fifty-one million, four hundred twenty-six thousand, four hundred two".