2121221012000 has 48 divisors (see below), whose sum is σ = 5211840036312. Its totient is φ = 848488403200.

The previous prime is 2121221011969. The next prime is 2121221012023. The reversal of 2121221012000 is 2101221212.

It can be written as a sum of positive squares in 4 ways, for example, as 176880807184 + 1944340204816 = 420572^2 + 1394396^2 .

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, 265148627 + ... + 265156626.

Almost surely, 2^{2121221012000} is an apocalyptic number.

2121221012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121221012000 is an abundant number, since it is smaller than the sum of its proper divisors (3090619024312).

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

2121221012000 is an equidigital number, since it uses as much as digits as its factorization.

2121221012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530305278 (or 530305260 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121221012000 its reverse (2101221212), we get a palindrome (2123322233212).

The spelling of 2121221012000 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand".