121751671642 has 32 divisors (see below), whose sum is σ = 193948272000. Its totient is φ = 57161204928.

The previous prime is 121751671627. The next prime is 121751671651. The reversal of 121751671642 is 246176157121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2187268 + ... + 2242240.

It is an arithmetic number, because the mean of its divisors is an integer number (6060883500).

Almost surely, 2^121751671642 is an apocalyptic number.

121751671642 is a deficient number, since it is larger than the sum of its proper divisors (72196600358).

121751671642 is a wasteful number, since it uses less digits than its factorization.

121751671642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55510.

The product of its digits is 141120, while the sum is 43.

The spelling of 121751671642 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred seventy-one thousand, six hundred forty-two".