202212009978 has 32 divisors (see below), whose sum is σ = 441371229120. Its totient is φ = 61251173760.

The previous prime is 202212009959. The next prime is 202212009997. The reversal of 202212009978 is 879900212202.

It is an interprime number because it is at equal distance from previous prime (202212009959) and next prime (202212009997).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467763 + ... + 789446.

It is an arithmetic number, because the mean of its divisors is an integer number (13792850910).

Almost surely, 2^202212009978 is an apocalyptic number.

202212009978 is an abundant number, since it is smaller than the sum of its proper divisors (239159219142).

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

202212009978 is a wasteful number, since it uses less digits than its factorization.

202212009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259662.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 202212009978 in words is "two hundred two billion, two hundred twelve million, nine thousand, nine hundred seventy-eight".