2121345533100 has 288 divisors, whose sum is σ = 6615536578560. Its totient is φ = 523230624000.

The previous prime is 2121345533057. The next prime is 2121345533149. The reversal of 2121345533100 is 13355431212.

It is a super-2 number, since 2×2121345533100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 41658655 + ... + 41709545.

It is an arithmetic number, because the mean of its divisors is an integer number (22970613120).

Almost surely, 2^{2121345533100} is an apocalyptic number.

2121345533100 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 2121345533100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3307768289280).

2121345533100 is an abundant number, since it is smaller than the sum of its proper divisors (4494191045460).

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

2121345533100 is a wasteful number, since it uses less digits than its factorization.

2121345533100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51101 (or 51094 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 2121345533100 in words is "two trillion, one hundred twenty-one billion, three hundred forty-five million, five hundred thirty-three thousand, one hundred".