121021111021001 has 8 divisors (see below), whose sum is σ = 121959752906880. Its totient is φ = 120085016332768.

The previous prime is 121021111020977. The next prime is 121021111021067. The reversal of 121021111021001 is 100120111120121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021111021001 is a prime.

It is a super-2 number, since 2×121021111021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021111024001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636704021 + ... + 636894066.

It is an arithmetic number, because the mean of its divisors is an integer number (15244969113360).

Almost surely, 2^{121021111021001} is an apocalyptic number.

It is an amenable number.

121021111021001 is a deficient number, since it is larger than the sum of its proper divisors (938641885879).

121021111021001 is a wasteful number, since it uses less digits than its factorization.

121021111021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273598823.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121021111021001 its reverse (100120111120121), we get a palindrome (221141222141122).

The spelling of 121021111021001 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred eleven million, twenty-one thousand, one".