2011202122221 has 6 divisors (see below), whose sum is σ = 2905069732110. Its totient is φ = 1340801414808.

The previous prime is 2011202122207. The next prime is 2011202122229. The reversal of 2011202122221 is 1222212021102.

It is a happy number.

2011202122221 is a `hidden beast` number, since 201 + 120 + 2 + 122 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1984396246596 + 26805875625 = 1408686^2 + 163725^2 .

It is not a de Polignac number, because 2011202122221 - 2⁷ = 2011202122093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011202122194 and 2011202122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011202122229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111733451226 + ... + 111733451243.

It is an arithmetic number, because the mean of its divisors is an integer number (484178288685).

Almost surely, 2^{2011202122221} is an apocalyptic number.

It is an amenable number.

2011202122221 is a deficient number, since it is larger than the sum of its proper divisors (893867609889).

2011202122221 is a wasteful number, since it uses less digits than its factorization.

2011202122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223466902475 (or 223466902472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2011202122221 its reverse (1222212021102), we get a palindrome (3233414143323).

The spelling of 2011202122221 in words is "two trillion, eleven billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".