1211120000978 has 4 divisors (see below), whose sum is σ = 1816680001470. Its totient is φ = 605560000488.

The previous prime is 1211120000977. The next prime is 1211120001001. The reversal of 1211120000978 is 8790000211121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 680834566129 + 530285434849 = 825127^2 + 728207^2 .

It is a super-4 number, since 4×1211120000978⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211120000977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302780000243 + ... + 302780000246.

Almost surely, 2^{1211120000978} is an apocalyptic number.

1211120000978 is a deficient number, since it is larger than the sum of its proper divisors (605560000492).

1211120000978 is an equidigital number, since it uses as much as digits as its factorization.

1211120000978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605560000491.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 1211120000978 in words is "one trillion, two hundred eleven billion, one hundred twenty million, nine hundred seventy-eight", and thus it is an aban number.