221212021202011 has 24 divisors (see below), whose sum is σ = 259111989503136. Its totient is φ = 188296755292800.

The previous prime is 221212021201979. The next prime is 221212021202059. The reversal of 221212021202011 is 110202120212122.

It is not a de Polignac number, because 221212021202011 - 2⁵ = 221212021201979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221212021202011.

It is not an unprimeable number, because it can be changed into a prime (221212021202611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19508805 + ... + 28688281.

It is an arithmetic number, because the mean of its divisors is an integer number (10796332895964).

Almost surely, 2^{221212021202011} is an apocalyptic number.

221212021202011 is a deficient number, since it is larger than the sum of its proper divisors (37899968301125).

221212021202011 is a wasteful number, since it uses less digits than its factorization.

221212021202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182899 (or 9182892 counting only the distinct ones).

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

Adding to 221212021202011 its reverse (110202120212122), we get a palindrome (331414141414133).

The spelling of 221212021202011 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-one million, two hundred two thousand, eleven".