2001022001212 has 96 divisors (see below), whose sum is σ = 3901541253120. Its totient is φ = 892179671040.

The previous prime is 2001022001161. The next prime is 2001022001221. The reversal of 2001022001212 is 2121002201002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2001022001192 and 2001022001201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89837637 + ... + 89859907.

It is an arithmetic number, because the mean of its divisors is an integer number (40641054720).

Almost surely, 2^{2001022001212} is an apocalyptic number.

It is an amenable number.

2001022001212 is a deficient number, since it is larger than the sum of its proper divisors (1900519251908).

2001022001212 is a wasteful number, since it uses less digits than its factorization.

2001022001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22811 (or 22809 counting only the distinct ones).

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

Adding to 2001022001212 its reverse (2121002201002), we get a palindrome (4122024202214).

The spelling of 2001022001212 in words is "two trillion, one billion, twenty-two million, one thousand, two hundred twelve".