121021013 has 8 divisors (see below), whose sum is σ = 127831200. Its totient is φ = 114254928.

The previous prime is 121021007. The next prime is 121021037. The reversal of 121021013 is 310120121.

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 121021013 - 2⁴ = 121020997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020985 and 121021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021003) 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, 5303 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (15978900).

Almost surely, 2^121021013 is an apocalyptic number.

It is an amenable number.

121021013 is a deficient number, since it is larger than the sum of its proper divisors (6810187).

121021013 is a wasteful number, since it uses less digits than its factorization.

121021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22051.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121021013 is about 11000.9550948997. The cubic root of 121021013 is about 494.6373741099.

Adding to 121021013 its reverse (310120121), we get a palindrome (431141134).

The spelling of 121021013 in words is "one hundred twenty-one million, twenty-one thousand, thirteen".