2001220101212 has 24 divisors (see below), whose sum is σ = 3689345071440. Its totient is φ = 947203994880.

The previous prime is 2001220101151. The next prime is 2001220101217. The reversal of 2001220101212 is 2121010221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220101217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10212989 + ... + 10407092.

It is an arithmetic number, because the mean of its divisors is an integer number (153722711310).

Almost surely, 2^{2001220101212} is an apocalyptic number.

It is an amenable number.

2001220101212 is a deficient number, since it is larger than the sum of its proper divisors (1688124970228).

2001220101212 is a wasteful number, since it uses less digits than its factorization.

2001220101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20621381 (or 20621379 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001220101212 its reverse (2121010221002), we get a palindrome (4122230322214).

The spelling of 2001220101212 in words is "two trillion, one billion, two hundred twenty million, one hundred one thousand, two hundred twelve".