221112212212202 has 4 divisors (see below), whose sum is σ = 331668318318306. Its totient is φ = 110556106106100.

The previous prime is 221112212212181. The next prime is 221112212212223. The reversal of 221112212212202 is 202212212211122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (221112212212181) and next prime (221112212212223).

It can be written as a sum of positive squares in only one way, i.e., 142516345396441 + 78595866815761 = 11938021^2 + 8865431^2 .

It is a super-2 number, since 2×221112212212202² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55278053053049 + ... + 55278053053052.

Almost surely, 2^{221112212212202} is an apocalyptic number.

221112212212202 is a deficient number, since it is larger than the sum of its proper divisors (110556106106104).

221112212212202 is a wasteful number, since it uses less digits than its factorization.

221112212212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110556106106103.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221112212212202 its reverse (202212212211122), we get a palindrome (423324424423324).

The spelling of 221112212212202 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twelve million, two hundred twelve thousand, two hundred two".