1212100001212 has 12 divisors (see below), whose sum is σ = 2121260566096. Its totient is φ = 606025553760.

The previous prime is 1212100001201. The next prime is 1212100001221. The reversal of 1212100001212 is 2121000012121.

It is a junction number, because it is equal to n+sod(n) for n = 1212100001192 and 1212100001201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5999928 + ... + 6198655.

Almost surely, 2^{1212100001212} is an apocalyptic number.

It is an amenable number.

1212100001212 is a deficient number, since it is larger than the sum of its proper divisors (909160564884).

1212100001212 is a wasteful number, since it uses less digits than its factorization.

1212100001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223428 (or 12223426 counting only the distinct ones).

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

Adding to 1212100001212 its reverse (2121000012121), we get a palindrome (3333100013333).

The spelling of 1212100001212 in words is "one trillion, two hundred twelve billion, one hundred million, one thousand, two hundred twelve".