221011121012212 has 24 divisors (see below), whose sum is σ = 403749651614400. Its totient is φ = 105657985462656.

The previous prime is 221011121012203. The next prime is 221011121012273. The reversal of 221011121012212 is 212210121110122.

It is a happy number.

It is a super-2 number, since 2×221011121012212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221011121012212.

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, 488243637 + ... + 488696092.

It is an arithmetic number, because the mean of its divisors is an integer number (16822902150600).

Almost surely, 2^{221011121012212} is an apocalyptic number.

It is an amenable number.

221011121012212 is a deficient number, since it is larger than the sum of its proper divisors (182738530602188).

221011121012212 is a wasteful number, since it uses less digits than its factorization.

221011121012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976942215 (or 976942213 counting only the distinct ones).

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

Adding to 221011121012212 its reverse (212210121110122), we get a palindrome (433221242122334).

The spelling of 221011121012212 in words is "two hundred twenty-one trillion, eleven billion, one hundred twenty-one million, twelve thousand, two hundred twelve".