2001211212022 has 16 divisors (see below), whose sum is σ = 3275125481232. Its totient is φ = 909525841920.

The previous prime is 2001211212019. The next prime is 2001211212029. The reversal of 2001211212022 is 2202121121002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001211211987 and 2001211212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001211212029) 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, 5603763 + ... + 5950174.

It is an arithmetic number, because the mean of its divisors is an integer number (204695342577).

Almost surely, 2^{2001211212022} is an apocalyptic number.

2001211212022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001211212022 is a deficient number, since it is larger than the sum of its proper divisors (1273914269210).

2001211212022 is a wasteful number, since it uses less digits than its factorization.

2001211212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561823.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001211212022 its reverse (2202121121002), we get a palindrome (4203332333024).

The spelling of 2001211212022 in words is "two trillion, one billion, two hundred eleven million, two hundred twelve thousand, twenty-two".