1222101498978 has 24 divisors (see below), whose sum is σ = 2647911759948. Its totient is φ = 407363292672.

The previous prime is 1222101498977. The next prime is 1222101499001. The reversal of 1222101498978 is 8798941012221.

1222101498978 is a `hidden beast` number, since 122 + 21 + 0 + 1 + 498 + 9 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1179141889689 + 42959609289 = 1085883^2 + 207267^2 .

It is not an unprimeable number, because it can be changed into a prime (1222101498977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2123950 + ... + 2637302.

Almost surely, 2^{1222101498978} is an apocalyptic number.

1222101498978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1222101498978 is an abundant number, since it is smaller than the sum of its proper divisors (1425810260970).

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

1222101498978 is a wasteful number, since it uses less digits than its factorization.

1222101498978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645618 (or 645615 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 1222101498978 in words is "one trillion, two hundred twenty-two billion, one hundred one million, four hundred ninety-eight thousand, nine hundred seventy-eight".