2212202122221 has 128 divisors (see below), whose sum is σ = 3744915865600. Its totient is φ = 1130717491200.

The previous prime is 2212202122219. The next prime is 2212202122237. The reversal of 2212202122221 is 1222212022122.

It is not a de Polignac number, because 2212202122221 - 2¹ = 2212202122219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212202122201) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 341333301 + ... + 341339781.

It is an arithmetic number, because the mean of its divisors is an integer number (29257155200).

Almost surely, 2^{2212202122221} is an apocalyptic number.

2212202122221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2212202122221 is a deficient number, since it is larger than the sum of its proper divisors (1532713743379).

2212202122221 is a wasteful number, since it uses less digits than its factorization.

2212202122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2212202122221 its reverse (1222212022122), we get a palindrome (3434414144343).

The spelling of 2212202122221 in words is "two trillion, two hundred twelve billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".