121005529021 has 8 divisors (see below), whose sum is σ = 134807221080. Its totient is φ = 107845776192.

The previous prime is 121005529019. The next prime is 121005529027. The reversal of 121005529021 is 120925500121.

It can be written as a sum of positive squares in 4 ways, for example, as 21411005625 + 99594523396 = 146325^2 + 315586^2 .

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 121005529021 - 2¹ = 121005529019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121005529027) 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, 160484410 + ... + 160485163.

It is an arithmetic number, because the mean of its divisors is an integer number (16850902635).

Almost surely, 2^121005529021 is an apocalyptic number.

It is an amenable number.

121005529021 is a deficient number, since it is larger than the sum of its proper divisors (13801692059).

121005529021 is a wasteful number, since it uses less digits than its factorization.

121005529021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320969615.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 121005529021 in words is "one hundred twenty-one billion, five million, five hundred twenty-nine thousand, twenty-one".