2121201002001 has 8 divisors (see below), whose sum is σ = 2833037428320. Its totient is φ = 1411749288512.

The previous prime is 2121201001987. The next prime is 2121201002009. The reversal of 2121201002001 is 1002001021212.

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 2121201002001 - 2¹⁵ = 2121200969233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121201002009) 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, 596176131 + ... + 596179688.

It is an arithmetic number, because the mean of its divisors is an integer number (354129678540).

Almost surely, 2^{2121201002001} is an apocalyptic number.

It is an amenable number.

2121201002001 is a deficient number, since it is larger than the sum of its proper divisors (711836426319).

2121201002001 is a wasteful number, since it uses less digits than its factorization.

2121201002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192356415.

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

Adding to 2121201002001 its reverse (1002001021212), we get a palindrome (3123202023213).

It can be divided in two parts, 212120 and 1002001, that added together give a palindrome (1214121).

The spelling of 2121201002001 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two thousand, one".