2121220220001 has 8 divisors (see below), whose sum is σ = 2951262914880. Its totient is φ = 1352662169232.

The previous prime is 2121220219981. The next prime is 2121220220023. The reversal of 2121220220001 is 1000220221212.

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

It is not a de Polignac number, because 2121220220001 - 2³¹ = 2119072736353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121222220001) 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, 15371160946 + ... + 15371161083.

It is an arithmetic number, because the mean of its divisors is an integer number (368907864360).

Almost surely, 2^{2121220220001} is an apocalyptic number.

It is an amenable number.

2121220220001 is a deficient number, since it is larger than the sum of its proper divisors (830042694879).

2121220220001 is a wasteful number, since it uses less digits than its factorization.

2121220220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30742322055.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121220220001 its reverse (1000220221212), we get a palindrome (3121440441213).

The spelling of 2121220220001 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, one".