222212211998 has 12 divisors (see below), whose sum is σ = 387737635392. Its totient is φ = 95233805100.

The previous prime is 222212211997. The next prime is 222212212007. The reversal of 222212211998 is 899112212222.

It is a super-2 number, since 2×222212211998² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212211997) 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, 1133735678 + ... + 1133735873.

It is an arithmetic number, because the mean of its divisors is an integer number (32311469616).

Almost surely, 2^222212211998 is an apocalyptic number.

222212211998 is a deficient number, since it is larger than the sum of its proper divisors (165525423394).

222212211998 is a wasteful number, since it uses less digits than its factorization.

222212211998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267471567 (or 2267471560 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The spelling of 222212211998 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred eleven thousand, nine hundred ninety-eight".