2221523121000 has 128 divisors (see below), whose sum is σ = 6943468521600. Its totient is φ = 591353484800.

The previous prime is 2221523120951. The next prime is 2221523121029. The reversal of 2221523121000 is 1213251222.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1031356 + ... + 2346644.

It is an arithmetic number, because the mean of its divisors is an integer number (54245847825).

Almost surely, 2^{2221523121000} is an apocalyptic number.

2221523121000 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 2221523121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3471734260800).

2221523121000 is an abundant number, since it is smaller than the sum of its proper divisors (4721945400600).

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

2221523121000 is a wasteful number, since it uses less digits than its factorization.

2221523121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315876 (or 1315862 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 2221523121000 its reverse (1213251222), we get a palindrome (2222736372222).

The spelling of 2221523121000 in words is "two trillion, two hundred twenty-one billion, five hundred twenty-three million, one hundred twenty-one thousand".