121155061749 has 8 divisors (see below), whose sum is σ = 161556437472. Its totient is φ = 80761863600.

The previous prime is 121155061723. The next prime is 121155061751. The reversal of 121155061749 is 947160551121.

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

It is not a de Polignac number, because 121155061749 - 2¹³ = 121155053557 is a prime.

It is a super-3 number, since 3×121155061749³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121155061749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121155061759) 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, 2009739 + ... + 2069144.

It is an arithmetic number, because the mean of its divisors is an integer number (20194554684).

Almost surely, 2^121155061749 is an apocalyptic number.

It is an amenable number.

121155061749 is a deficient number, since it is larger than the sum of its proper divisors (40401375723).

121155061749 is an equidigital number, since it uses as much as digits as its factorization.

121155061749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088787.

The product of its (nonzero) digits is 75600, while the sum is 42.

The spelling of 121155061749 in words is "one hundred twenty-one billion, one hundred fifty-five million, sixty-one thousand, seven hundred forty-nine".