121021000001 has 8 divisors (see below), whose sum is σ = 139788962784. Its totient is φ = 103547379520.

The previous prime is 121020999977. The next prime is 121021000031. The reversal of 121021000001 is 100000120121.

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 121021000001 - 2¹⁰ = 121020998977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021000031) 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, 323585375 + ... + 323585748.

It is an arithmetic number, because the mean of its divisors is an integer number (17473620348).

Almost surely, 2^121021000001 is an apocalyptic number.

121021000001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121021000001 is a deficient number, since it is larger than the sum of its proper divisors (18767962783).

121021000001 is a wasteful number, since it uses less digits than its factorization.

121021000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647171151.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 121021000001 its reverse (100000120121), we get a palindrome (221021120122).

The spelling of 121021000001 in words is "one hundred twenty-one billion, twenty-one million, one", and thus it is an aban number.