121210020020001 has 16 divisors (see below), whose sum is σ = 176478501853440. Its totient is φ = 73388527282320.

The previous prime is 121210020019889. The next prime is 121210020020057. The reversal of 121210020020001 is 100020020012121.

It is not a de Polignac number, because 121210020020001 - 2⁷ = 121210020019873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121210020020071) 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, 1802238655 + ... + 1802305908.

It is an arithmetic number, because the mean of its divisors is an integer number (11029906365840).

Almost surely, 2^{121210020020001} is an apocalyptic number.

121210020020001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121210020020001 is a deficient number, since it is larger than the sum of its proper divisors (55268481833439).

121210020020001 is a wasteful number, since it uses less digits than its factorization.

121210020020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604545596.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121210020020001 its reverse (100020020012121), we get a palindrome (221230040032122).

The spelling of 121210020020001 in words is "one hundred twenty-one trillion, two hundred ten billion, twenty million, twenty thousand, one".