121111020002001 has 16 divisors (see below), whose sum is σ = 161514824623424. Its totient is φ = 80723949413184.

The previous prime is 121111020001991. The next prime is 121111020002041. The reversal of 121111020002001 is 100200020111121.

It is not a de Polignac number, because 121111020002001 - 2²⁵ = 121110986447569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111020002041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294890271 + ... + 295300683.

It is an arithmetic number, because the mean of its divisors is an integer number (10094676538964).

Almost surely, 2^{121111020002001} is an apocalyptic number.

It is an amenable number.

121111020002001 is a deficient number, since it is larger than the sum of its proper divisors (40403804621423).

121111020002001 is a wasteful number, since it uses less digits than its factorization.

121111020002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430560.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121111020002001 its reverse (100200020111121), we get a palindrome (221311040113122).

The spelling of 121111020002001 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty million, two thousand, one".