10212009978 has 8 divisors (see below), whose sum is σ = 20424019968. Its totient is φ = 3404003324.

The previous prime is 10212009961. The next prime is 10212009979. The reversal of 10212009978 is 87990021201.

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

10212009978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (10212009979) 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, 851000826 + ... + 851000837.

It is an arithmetic number, because the mean of its divisors is an integer number (2553002496).

Almost surely, 2^10212009978 is an apocalyptic number.

10212009978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10212009978 is a wasteful number, since it uses less digits than its factorization.

10212009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702001668.

The product of its (nonzero) digits is 18144, while the sum is 39.

The spelling of 10212009978 in words is "ten billion, two hundred twelve million, nine thousand, nine hundred seventy-eight".