11000222201981 has 4 divisors (see below), whose sum is σ = 11000416859712. Its totient is φ = 11000027544252.

The previous prime is 11000222201923. The next prime is 11000222201989. The reversal of 11000222201981 is 18910222200011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11000222201981 - 2³⁴ = 10983042332797 is a prime.

It is a super-2 number, since 2×11000222201981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000222201989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97244075 + ... + 97357128.

It is an arithmetic number, because the mean of its divisors is an integer number (2750104214928).

Almost surely, 2^{11000222201981} is an apocalyptic number.

It is an amenable number.

11000222201981 is a deficient number, since it is larger than the sum of its proper divisors (194657731).

11000222201981 is an equidigital number, since it uses as much as digits as its factorization.

11000222201981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194657730.

The product of its (nonzero) digits is 1152, while the sum is 29.

Adding to 11000222201981 its reverse (18910222200011), we get a palindrome (29910444401992).

The spelling of 11000222201981 in words is "eleven trillion, two hundred twenty-two million, two hundred one thousand, nine hundred eighty-one".