121143747 has 4 divisors (see below), whose sum is σ = 161525000. Its totient is φ = 80762496.

The previous prime is 121143731. The next prime is 121143761. The reversal of 121143747 is 747341121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747341121 = 3 ⋅249113707.

It is not a de Polignac number, because 121143747 - 2⁴ = 121143731 is a prime.

It is a super-3 number, since 3×121143747³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121143707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20190622 + ... + 20190627.

It is an arithmetic number, because the mean of its divisors is an integer number (40381250).

Almost surely, 2^121143747 is an apocalyptic number.

121143747 is a deficient number, since it is larger than the sum of its proper divisors (40381253).

121143747 is an equidigital number, since it uses as much as digits as its factorization.

121143747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40381252.

The product of its digits is 4704, while the sum is 30.

The square root of 121143747 is about 11006.5320151263. The cubic root of 121143747 is about 494.8045305147.

Adding to 121143747 its reverse (747341121), we get a palindrome (868484868).

The spelling of 121143747 in words is "one hundred twenty-one million, one hundred forty-three thousand, seven hundred forty-seven".