2121000114640 has 80 divisors (see below), whose sum is σ = 5380603940736. Its totient is φ = 771132787200.

The previous prime is 2121000114637. The next prime is 2121000114641. The reversal of 2121000114640 is 464110001212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000114641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4695349 + ... + 5127211.

Almost surely, 2^{2121000114640} is an apocalyptic number.

2121000114640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121000114640 is an abundant number, since it is smaller than the sum of its proper divisors (3259603826096).

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

2121000114640 is a wasteful number, since it uses less digits than its factorization.

2121000114640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437468 (or 437462 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 2121000114640 its reverse (464110001212), we get a palindrome (2585110115852).

The spelling of 2121000114640 in words is "two trillion, one hundred twenty-one billion, one hundred fourteen thousand, six hundred forty".