121771361492 has 24 divisors (see below), whose sum is σ = 233131191552. Its totient is φ = 55193811200.

The previous prime is 121771361441. The next prime is 121771361497. The reversal of 121771361492 is 294163177121.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121771361497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3904484 + ... + 3935547.

It is an arithmetic number, because the mean of its divisors is an integer number (9713799648).

Almost surely, 2^121771361492 is an apocalyptic number.

It is an amenable number.

121771361492 is a deficient number, since it is larger than the sum of its proper divisors (111359830060).

121771361492 is a wasteful number, since it uses less digits than its factorization.

121771361492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840399 (or 7840397 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The spelling of 121771361492 in words is "one hundred twenty-one billion, seven hundred seventy-one million, three hundred sixty-one thousand, four hundred ninety-two".