10221031299978 has 16 divisors (see below), whose sum is σ = 22713402888960. Its totient is φ = 3407010433308.

The previous prime is 10221031299929. The next prime is 10221031299979. The reversal of 10221031299978 is 87999213012201.

10221031299978 is a `hidden beast` number, since 10 + 221 + 0 + 31 + 299 + 97 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 189278357407 = 10221031299978 / (1 + 0 + 2 + 2 + 1 + 0 + 3 + 1 + 2 + 9 + 9 + 9 + 7 + 8).

It is not an unprimeable number, because it can be changed into a prime (10221031299979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94639178650 + ... + 94639178757.

It is an arithmetic number, because the mean of its divisors is an integer number (1419587680560).

Almost surely, 2^{10221031299978} is an apocalyptic number.

10221031299978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10221031299978 is an abundant number, since it is smaller than the sum of its proper divisors (12492371588982).

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

10221031299978 is a wasteful number, since it uses less digits than its factorization.

10221031299978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189278357418 (or 189278357412 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 10221031299978 in words is "ten trillion, two hundred twenty-one billion, thirty-one million, two hundred ninety-nine thousand, nine hundred seventy-eight".