2121020201001 has 32 divisors (see below), whose sum is σ = 3111275801088. Its totient is φ = 1277098721280.

The previous prime is 2121020200997. The next prime is 2121020201011. The reversal of 2121020201001 is 1001020201212.

It is not a de Polignac number, because 2121020201001 - 2² = 2121020200997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121020201011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6169321 + ... + 6504041.

It is an arithmetic number, because the mean of its divisors is an integer number (97227368784).

Almost surely, 2^{2121020201001} is an apocalyptic number.

It is an amenable number.

2121020201001 is a deficient number, since it is larger than the sum of its proper divisors (990255600087).

2121020201001 is a wasteful number, since it uses less digits than its factorization.

2121020201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338241.

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

Adding to 2121020201001 its reverse (1001020201212), we get a palindrome (3122040402213).

The spelling of 2121020201001 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred one thousand, one".