121631747 has 4 divisors (see below), whose sum is σ = 122163120. Its totient is φ = 121100376.

The previous prime is 121631737. The next prime is 121631777. The reversal of 121631747 is 747136121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747136121 = 941 ⋅793981.

It is a cyclic number.

It is not a de Polignac number, because 121631747 - 2¹⁴ = 121615363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121631717) 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, 265343 + ... + 265800.

It is an arithmetic number, because the mean of its divisors is an integer number (30540780).

Almost surely, 2^121631747 is an apocalyptic number.

121631747 is a deficient number, since it is larger than the sum of its proper divisors (531373).

121631747 is an equidigital number, since it uses as much as digits as its factorization.

121631747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531372.

The product of its digits is 7056, while the sum is 32.

The square root of 121631747 is about 11028.6783886375. The cubic root of 121631747 is about 495.4680428355.

Adding to 121631747 its reverse (747136121), we get a palindrome (868767868).

The spelling of 121631747 in words is "one hundred twenty-one million, six hundred thirty-one thousand, seven hundred forty-seven".