2101222002001 has 4 divisors (see below), whose sum is σ = 2111888103732. Its totient is φ = 2090555900272.

The previous prime is 2101222001999. The next prime is 2101222002017. The reversal of 2101222002001 is 1002002221012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2083184168976 + 18037833025 = 1443324^2 + 134305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101222002001 - 2¹ = 2101222001999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101222002601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5333050570 + ... + 5333050963.

It is an arithmetic number, because the mean of its divisors is an integer number (527972025933).

Almost surely, 2^{2101222002001} is an apocalyptic number.

It is an amenable number.

2101222002001 is a deficient number, since it is larger than the sum of its proper divisors (10666101731).

2101222002001 is a wasteful number, since it uses less digits than its factorization.

2101222002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10666101730.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2101222002001 its reverse (1002002221012), we get a palindrome (3103224223013).

The spelling of 2101222002001 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two thousand, one".