1000122219978 has 16 divisors (see below), whose sum is σ = 2285993645760. Its totient is φ = 285749205696.

The previous prime is 1000122219949. The next prime is 1000122220003. The reversal of 1000122219978 is 8799122210001.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 23812433809 = 1000122219978 / (1 + 0 + 0 + 0 + 1 + 2 + 2 + 2 + 1 + 9 + 9 + 7 + 8).

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, 11906216863 + ... + 11906216946.

It is an arithmetic number, because the mean of its divisors is an integer number (142874602860).

Almost surely, 2^{1000122219978} is an apocalyptic number.

1000122219978 is an abundant number, since it is smaller than the sum of its proper divisors (1285871425782).

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

1000122219978 is a wasteful number, since it uses less digits than its factorization.

1000122219978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23812433821.

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

Adding to 1000122219978 its reverse (8799122210001), we get a palindrome (9799244429979).

The spelling of 1000122219978 in words is "one trillion, one hundred twenty-two million, two hundred nineteen thousand, nine hundred seventy-eight".