11021122109978 has 8 divisors (see below), whose sum is σ = 16531711704468. Its totient is φ = 5510551541824.

The previous prime is 11021122109971. The next prime is 11021122109993. The reversal of 11021122109978 is 87990122112011.

It can be written as a sum of positive squares in 2 ways, for example, as 9942209878129 + 1078912231849 = 3153127^2 + 1038707^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11021122109971) 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, 3207551 + ... + 5686002.

Almost surely, 2^{11021122109978} is an apocalyptic number.

11021122109978 is a deficient number, since it is larger than the sum of its proper divisors (5510589594490).

11021122109978 is an equidigital number, since it uses as much as digits as its factorization.

11021122109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513168.

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 11021122109978 in words is "eleven trillion, twenty-one billion, one hundred twenty-two million, one hundred nine thousand, nine hundred seventy-eight".