10011001221998 has 8 divisors (see below), whose sum is σ = 17161716380592. Its totient is φ = 4290429095136.

The previous prime is 10011001221973. The next prime is 10011001222007. The reversal of 10011001221998 is 89912210011001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10011001221998² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357535757915 + ... + 357535757942.

It is an arithmetic number, because the mean of its divisors is an integer number (2145214547574).

Almost surely, 2^{10011001221998} is an apocalyptic number.

10011001221998 is a deficient number, since it is larger than the sum of its proper divisors (7150715158594).

10011001221998 is an equidigital number, since it uses as much as digits as its factorization.

10011001221998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715071515866.

The product of its (nonzero) digits is 2592, while the sum is 35.

Adding to 10011001221998 its reverse (89912210011001), we get a palindrome (99923211232999).

The spelling of 10011001221998 in words is "ten trillion, eleven billion, one million, two hundred twenty-one thousand, nine hundred ninety-eight".