121755372051 has 8 divisors (see below), whose sum is σ = 163579737024. Its totient is φ = 80550627560.

The previous prime is 121755372049. The next prime is 121755372077. The reversal of 121755372051 is 150273557121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121755372051 - 2¹ = 121755372049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121755372001) 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, 154904661 + ... + 154905446.

It is an arithmetic number, because the mean of its divisors is an integer number (20447467128).

Almost surely, 2^121755372051 is an apocalyptic number.

121755372051 is a deficient number, since it is larger than the sum of its proper divisors (41824364973).

121755372051 is a wasteful number, since it uses less digits than its factorization.

121755372051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309810241.

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 121755372051 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy-two thousand, fifty-one".