121961727702 has 56 divisors (see below), whose sum is σ = 277760679840. Its totient is φ = 40139264880.

The previous prime is 121961727691. The next prime is 121961727779. The reversal of 121961727702 is 207727169121.

121961727702 is a `hidden beast` number, since 1 + 2 + 1 + 9 + 617 + 27 + 7 + 0 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 414249 + ... + 644612.

It is an arithmetic number, because the mean of its divisors is an integer number (4960012140).

Almost surely, 2^121961727702 is an apocalyptic number.

121961727702 is an abundant number, since it is smaller than the sum of its proper divisors (155798952138).

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

121961727702 is an equidigital number, since it uses as much as digits as its factorization.

121961727702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058960 (or 1058945 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The spelling of 121961727702 in words is "one hundred twenty-one billion, nine hundred sixty-one million, seven hundred twenty-seven thousand, seven hundred two".