1000002121000 has 64 divisors (see below), whose sum is σ = 2340530010000. Its totient is φ = 399911097600.

The previous prime is 1000002120983. The next prime is 1000002121007. The reversal of 1000002121000 is 1212000001.

It can be written as a sum of positive squares in 8 ways, for example, as 65651763076 + 934350357924 = 256226^2 + 966618^2 .

It is not an unprimeable number, because it can be changed into a prime (1000002121007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4439086 + ... + 4658914.

Almost surely, 2^{1000002121000} is an apocalyptic number.

1000002121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000002121000 is an abundant number, since it is smaller than the sum of its proper divisors (1340527889000).

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

1000002121000 is a wasteful number, since it uses less digits than its factorization.

1000002121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224399 (or 224385 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1000002121000 its reverse (1212000001), we get a palindrome (1001214121001).

The spelling of 1000002121000 in words is "one trillion, two million, one hundred twenty-one thousand".