1212111002000 has 40 divisors (see below), whose sum is σ = 2930884407672. Its totient is φ = 484844400000.

The previous prime is 1212111001991. The next prime is 1212111002017. The reversal of 1212111002000 is 2001112121.

It can be written as a sum of positive squares in 4 ways, for example, as 25553940736 + 1186557061264 = 159856^2 + 1089292^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303025751 + ... + 303029750.

Almost surely, 2^{1212111002000} is an apocalyptic number.

1212111002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212111002000 is an abundant number, since it is smaller than the sum of its proper divisors (1718773405672).

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

1212111002000 is an equidigital number, since it uses as much as digits as its factorization.

1212111002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606055524 (or 606055508 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1212111002000 its reverse (2001112121), we get a palindrome (1214112114121).

It can be divided in two parts, 121211 and 1002000, that added together give a palindrome (1123211).

The spelling of 1212111002000 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two thousand".