2001021021222 has 8 divisors (see below), whose sum is σ = 4002042042456. Its totient is φ = 667007007072.

The previous prime is 2001021021217. The next prime is 2001021021227. The reversal of 2001021021222 is 2221201201002.

It is an interprime number because it is at equal distance from previous prime (2001021021217) and next prime (2001021021227).

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

2001021021222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001021021227) 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, 166751751763 + ... + 166751751774.

It is an arithmetic number, because the mean of its divisors is an integer number (500255255307).

Almost surely, 2^{2001021021222} is an apocalyptic number.

2001021021222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001021021222 is a wasteful number, since it uses less digits than its factorization.

2001021021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333503503542.

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

Adding to 2001021021222 its reverse (2221201201002), we get a palindrome (4222222222224).

The spelling of 2001021021222 in words is "two trillion, one billion, twenty-one million, twenty-one thousand, two hundred twenty-two".