3121223021000 has 96 divisors (see below), whose sum is σ = 8496096593400. Its totient is φ = 1070133590400.

The previous prime is 3121223020999. The next prime is 3121223021051. The reversal of 3121223021000 is 1203221213.

It can be written as a sum of positive squares in 4 ways, for example, as 465672489604 + 2655550531396 = 682402^2 + 1629586^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3121223021000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31800215 + ... + 31898214.

Almost surely, 2^{3121223021000} is an apocalyptic number.

It is an amenable number.

3121223021000 is an abundant number, since it is smaller than the sum of its proper divisors (5374873572400).

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

3121223021000 is a wasteful number, since it uses less digits than its factorization.

3121223021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63698464 (or 63698443 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 3121223021000 its reverse (1203221213), we get a palindrome (3122426242213).

The spelling of 3121223021000 in words is "three trillion, one hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand".