1001222109978 has 32 divisors (see below), whose sum is σ = 2212419194496. Its totient is φ = 300451987968.

The previous prime is 1001222109977. The next prime is 1001222109991. The reversal of 1001222109978 is 8799012221001.

It is not an unprimeable number, because it can be changed into a prime (1001222109977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213386851 + ... + 213391542.

It is an arithmetic number, because the mean of its divisors is an integer number (69138099828).

Almost surely, 2^{1001222109978} is an apocalyptic number.

1001222109978 is an abundant number, since it is smaller than the sum of its proper divisors (1211197084518).

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

1001222109978 is a wasteful number, since it uses less digits than its factorization.

1001222109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426778438.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 1001222109978 in words is "one trillion, one billion, two hundred twenty-two million, one hundred nine thousand, nine hundred seventy-eight".