221010122021212 has 12 divisors (see below), whose sum is σ = 386776511418136. Its totient is φ = 110502547330320.

The previous prime is 221010122021179. The next prime is 221010122021279. The reversal of 221010122021212 is 212120221010122.

It is a self number, because there is not a number n which added to its sum of digits gives 221010122021212.

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, 628222239 + ... + 628573942.

Almost surely, 2^{221010122021212} is an apocalyptic number.

It is an amenable number.

221010122021212 is a deficient number, since it is larger than the sum of its proper divisors (165766389396924).

221010122021212 is a wasteful number, since it uses less digits than its factorization.

221010122021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256840148 (or 1256840146 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221010122021212 its reverse (212120221010122), we get a palindrome (433130343031334).

The spelling of 221010122021212 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty-two million, twenty-one thousand, two hundred twelve".