121967747 has 4 divisors (see below), whose sum is σ = 133055736. Its totient is φ = 110879760.

The previous prime is 121967717. The next prime is 121967761. The reversal of 121967747 is 747769121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747769121 = 11 ⋅67979011.

It is a cyclic number.

It is not a de Polignac number, because 121967747 - 2¹⁴ = 121951363 is a prime.

It is a super-2 number, since 2×121967747² = 29752262616512018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121967698 and 121967707.

It is not an unprimeable number, because it can be changed into a prime (121967717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5543978 + ... + 5543999.

It is an arithmetic number, because the mean of its divisors is an integer number (33263934).

Almost surely, 2^121967747 is an apocalyptic number.

121967747 is a deficient number, since it is larger than the sum of its proper divisors (11087989).

121967747 is a wasteful number, since it uses less digits than its factorization.

121967747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11087988.

The product of its digits is 148176, while the sum is 44.

The square root of 121967747 is about 11043.9008959697. The cubic root of 121967747 is about 495.9238564067.

The spelling of 121967747 in words is "one hundred twenty-one million, nine hundred sixty-seven thousand, seven hundred forty-seven".