121067765621 has 8 divisors (see below), whose sum is σ = 132543943488. Its totient is φ = 109669924000.

The previous prime is 121067765617. The next prime is 121067765633. The reversal of 121067765621 is 126567760121.

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 121067765621 - 2² = 121067765617 is a prime.

It is a super-2 number, since 2×121067765621² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121067765681) 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, 19580825 + ... + 19587006.

It is an arithmetic number, because the mean of its divisors is an integer number (16567992936).

Almost surely, 2^121067765621 is an apocalyptic number.

121067765621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121067765621 is a deficient number, since it is larger than the sum of its proper divisors (11476177867).

121067765621 is a wasteful number, since it uses less digits than its factorization.

121067765621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39168123.

The product of its (nonzero) digits is 211680, while the sum is 44.

It can be divided in two parts, 121067 and 765621, that added together give a palindrome (886688).

The spelling of 121067765621 in words is "one hundred twenty-one billion, sixty-seven million, seven hundred sixty-five thousand, six hundred twenty-one".