2211222220998 has 24 divisors (see below), whose sum is σ = 5144476188312. Its totient is φ = 631777777344.

The previous prime is 2211222220997. The next prime is 2211222221189. The reversal of 2211222220998 is 8990222221122.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211222220997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3760581715 + ... + 3760582302.

It is an arithmetic number, because the mean of its divisors is an integer number (214353174513).

Almost surely, 2^{2211222220998} is an apocalyptic number.

2211222220998 is an abundant number, since it is smaller than the sum of its proper divisors (2933253967314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211222220998 is a wasteful number, since it uses less digits than its factorization.

2211222220998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521164036 (or 7521164029 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 2211222220998 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, nine hundred ninety-eight".