2011212202221 has 16 divisors (see below), whose sum is σ = 2997853232320. Its totient is φ = 1332582315120.

The previous prime is 2011212202213. The next prime is 2011212202229. The reversal of 2011212202221 is 1222022121102.

It is a happy number.

2011212202221 is a `hidden beast` number, since 20 + 11 + 212 + 202 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (2011212202213) and next prime (2011212202229).

It is not a de Polignac number, because 2011212202221 - 2³ = 2011212202213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011212202194 and 2011212202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011212202229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228490510 + ... + 228499311.

It is an arithmetic number, because the mean of its divisors is an integer number (187365827020).

Almost surely, 2^{2011212202221} is an apocalyptic number.

It is an amenable number.

2011212202221 is a deficient number, since it is larger than the sum of its proper divisors (986641030099).

2011212202221 is a wasteful number, since it uses less digits than its factorization.

2011212202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456989993 (or 456989987 counting only the distinct ones).

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

Adding to 2011212202221 its reverse (1222022121102), we get a palindrome (3233234323323).

The spelling of 2011212202221 in words is "two trillion, eleven billion, two hundred twelve million, two hundred two thousand, two hundred twenty-one".