1012201219978 has 32 divisors (see below), whose sum is σ = 1763941926096. Its totient is φ = 431393184768.

The previous prime is 1012201219963. The next prime is 1012201219993. The reversal of 1012201219978 is 8799121022101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1012201219963) and next prime (1012201219993).

It can be written as a sum of positive squares in 8 ways, for example, as 211450066569 + 800751153409 = 459837^2 + 894847^2 .

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, 21580801 + ... + 21627652.

Almost surely, 2^{1012201219978} is an apocalyptic number.

1012201219978 is a deficient number, since it is larger than the sum of its proper divisors (751740706118).

1012201219978 is a wasteful number, since it uses less digits than its factorization.

1012201219978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43208538.

The product of its (nonzero) digits is 36288, while the sum is 43.

The spelling of 1012201219978 in words is "one trillion, twelve billion, two hundred one million, two hundred nineteen thousand, nine hundred seventy-eight".