11221021999955 has 8 divisors (see below), whose sum is σ = 13521566260800. Its totient is φ = 8939257692736.

The previous prime is 11221021999949. The next prime is 11221021999969. The reversal of 11221021999955 is 55999912012211.

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

It is a cyclic number.

It is not a de Polignac number, because 11221021999955 - 2¹⁴ = 11221021983571 is a prime.

It is a super-2 number, since 2×11221021999955² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221021999955.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4694987090 + ... + 4694989479.

It is an arithmetic number, because the mean of its divisors is an integer number (1690195782600).

Almost surely, 2^{11221021999955} is an apocalyptic number.

11221021999955 is a deficient number, since it is larger than the sum of its proper divisors (2300544260845).

11221021999955 is an equidigital number, since it uses as much as digits as its factorization.

11221021999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9389976813.

The product of its (nonzero) digits is 1312200, while the sum is 56.

The spelling of 11221021999955 in words is "eleven trillion, two hundred twenty-one billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred fifty-five".