2121600801650 has 72 divisors (see below), whose sum is σ = 4360110403824. Its totient is φ = 761724256800.

The previous prime is 2121600801581. The next prime is 2121600801673. The reversal of 2121600801650 is 561080061212.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3123509 + ... + 3741591.

It is an arithmetic number, because the mean of its divisors is an integer number (60557088942).

Almost surely, 2^{2121600801650} is an apocalyptic number.

2121600801650 is an abundant number, since it is smaller than the sum of its proper divisors (2238509602174).

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

2121600801650 is a wasteful number, since it uses less digits than its factorization.

2121600801650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618264 (or 618180 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 2121600801650 its reverse (561080061212), we get a palindrome (2682680862862).

The spelling of 2121600801650 in words is "two trillion, one hundred twenty-one billion, six hundred million, eight hundred one thousand, six hundred fifty".