2121023211000 has 128 divisors (see below), whose sum is σ = 6623792884800. Its totient is φ = 565076236800.

The previous prime is 2121023210989. The next prime is 2121023211007. The reversal of 2121023211000 is 1123201212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121023211007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2876314 + ... + 3537686.

Almost surely, 2^{2121023211000} is an apocalyptic number.

2121023211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121023211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3311896442400).

2121023211000 is an abundant number, since it is smaller than the sum of its proper divisors (4502769673800).

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

2121023211000 is a wasteful number, since it uses less digits than its factorization.

2121023211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662466 (or 662452 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2121023211000 its reverse (1123201212), we get a palindrome (2122146412212).

The spelling of 2121023211000 in words is "two trillion, one hundred twenty-one billion, twenty-three million, two hundred eleven thousand".