2001202121212 has 48 divisors (see below), whose sum is σ = 4238360985600. Its totient is φ = 807108302592.

The previous prime is 2001202121209. The next prime is 2001202121231. The reversal of 2001202121212 is 2121212021002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3678789 + ... + 4187587.

It is an arithmetic number, because the mean of its divisors is an integer number (88299187200).

Almost surely, 2^{2001202121212} is an apocalyptic number.

It is an amenable number.

2001202121212 is an abundant number, since it is smaller than the sum of its proper divisors (2237158864388).

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

2001202121212 is a wasteful number, since it uses less digits than its factorization.

2001202121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517090 (or 517088 counting only the distinct ones).

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

Adding to 2001202121212 its reverse (2121212021002), we get a palindrome (4122414142214).

The spelling of 2001202121212 in words is "two trillion, one billion, two hundred two million, one hundred twenty-one thousand, two hundred twelve".