2121233021000 has 64 divisors (see below), whose sum is σ = 5255666797680. Its totient is φ = 798581836800.

The previous prime is 2121233020979. The next prime is 2121233021059. The reversal of 2121233021000 is 1203321212.

It can be written as a sum of positive squares in 8 ways, for example, as 358185492196 + 1763047528804 = 598486^2 + 1327798^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 2121233021000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62372207 + ... + 62406206.

Almost surely, 2^{2121233021000} is an apocalyptic number.

2121233021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121233021000 is an abundant number, since it is smaller than the sum of its proper divisors (3134433776680).

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

2121233021000 is a wasteful number, since it uses less digits than its factorization.

2121233021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124778451 (or 124778437 counting only the distinct ones).

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

Adding to 2121233021000 its reverse (1203321212), we get a palindrome (2122436342212).

The spelling of 2121233021000 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, twenty-one thousand".