121621769 has 8 divisors (see below), whose sum is σ = 127176000. Its totient is φ = 116089776.

The previous prime is 121621763. The next prime is 121621781. The reversal of 121621769 is 967126121.

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

It is a cyclic number.

It is not a de Polignac number, because 121621769 - 2¹² = 121617673 is a prime.

It is a super-2 number, since 2×121621769² = 29583709389378722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121621763) 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, 6179 + ... + 16775.

It is an arithmetic number, because the mean of its divisors is an integer number (15897000).

Almost surely, 2^121621769 is an apocalyptic number.

It is an amenable number.

121621769 is a deficient number, since it is larger than the sum of its proper divisors (5554231).

121621769 is a wasteful number, since it uses less digits than its factorization.

121621769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119.

The product of its digits is 9072, while the sum is 35.

The square root of 121621769 is about 11028.2260132806. The cubic root of 121621769 is about 495.4544939733.

It can be divided in two parts, 12162 and 1769, that added together give a palindrome (13931).

The spelling of 121621769 in words is "one hundred twenty-one million, six hundred twenty-one thousand, seven hundred sixty-nine".