121220122002001 has 16 divisors (see below), whose sum is σ = 132309469218816. Its totient is φ = 110142333810000.

The previous prime is 121220122001999. The next prime is 121220122002061. The reversal of 121220122002001 is 100200221022121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121220122002001 - 2¹ = 121220122001999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220122002061) 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, 1570353316 + ... + 1570430506.

It is an arithmetic number, because the mean of its divisors is an integer number (8269341826176).

Almost surely, 2^{121220122002001} is an apocalyptic number.

121220122002001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220122002001 is a deficient number, since it is larger than the sum of its proper divisors (11089347216815).

121220122002001 is a wasteful number, since it uses less digits than its factorization.

121220122002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150204.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220122002001 its reverse (100200221022121), we get a palindrome (221420343024122).

The spelling of 121220122002001 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two thousand, one".