121720627 has 16 divisors (see below), whose sum is σ = 145252800. Its totient is φ = 99792000.

The previous prime is 121720619. The next prime is 121720637. The reversal of 121720627 is 726027121.

It is not a de Polignac number, because 121720627 - 2³ = 121720619 is a prime.

It is a super-2 number, since 2×121720627² = 29631822074546258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121720595 and 121720604.

It is not an unprimeable number, because it can be changed into a prime (121720637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19377 + ... + 24877.

It is an arithmetic number, because the mean of its divisors is an integer number (9078300).

Almost surely, 2^121720627 is an apocalyptic number.

121720627 is a deficient number, since it is larger than the sum of its proper divisors (23532173).

121720627 is a wasteful number, since it uses less digits than its factorization.

121720627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 121720627 is about 11032.7071473868. The cubic root of 121720627 is about 495.5886979513.

Adding to 121720627 its reverse (726027121), we get a palindrome (847747748).

The spelling of 121720627 in words is "one hundred twenty-one million, seven hundred twenty thousand, six hundred twenty-seven".