121755772106 has 8 divisors (see below), whose sum is σ = 190574252064. Its totient is φ = 58231021420.

The previous prime is 121755772093. The next prime is 121755772111. The reversal of 121755772106 is 601277557121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121755772106² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1323432260 + ... + 1323432351.

It is an arithmetic number, because the mean of its divisors is an integer number (23821781508).

Almost surely, 2^121755772106 is an apocalyptic number.

121755772106 is a deficient number, since it is larger than the sum of its proper divisors (68818479958).

121755772106 is a wasteful number, since it uses less digits than its factorization.

121755772106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646864636.

The product of its (nonzero) digits is 205800, while the sum is 44.

The spelling of 121755772106 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred seventy-two thousand, one hundred six".