212121212101012 has 6 divisors (see below), whose sum is σ = 371212121176778. Its totient is φ = 106060606050504.

The previous prime is 212121212101009. The next prime is 212121212101039. The reversal of 212121212101012 is 210101212121212.

It is a happy number.

212121212101012 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 207208942720516 + 4912269380496 = 14394754^2 + 2216364^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26515151512623 + ... + 26515151512630.

Almost surely, 2^{212121212101012} is an apocalyptic number.

It is an amenable number.

212121212101012 is a deficient number, since it is larger than the sum of its proper divisors (159090909075766).

212121212101012 is a wasteful number, since it uses less digits than its factorization.

212121212101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53030303025257 (or 53030303025255 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212121212101012 its reverse (210101212121212), we get a palindrome (422222424222224).

The spelling of 212121212101012 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, one hundred one thousand, twelve".