201211001212 has 24 divisors (see below), whose sum is σ = 379316984256. Its totient is φ = 92839276608.

The previous prime is 201211001197. The next prime is 201211001249. The reversal of 201211001212 is 212100112102.

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 = 201211001192 and 201211001201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390703 + ... + 745030.

It is an arithmetic number, because the mean of its divisors is an integer number (15804874344).

Almost surely, 2^201211001212 is an apocalyptic number.

It is an amenable number.

201211001212 is a deficient number, since it is larger than the sum of its proper divisors (178105983044).

201211001212 is a wasteful number, since it uses less digits than its factorization.

201211001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139157 (or 1139155 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201211001212 its reverse (212100112102), we get a palindrome (413311113314).

The spelling of 201211001212 in words is "two hundred one billion, two hundred eleven million, one thousand, two hundred twelve".