2121743283540 has 48 divisors (see below), whose sum is σ = 6199180380288. Its totient is φ = 541198286464.

The previous prime is 2121743283521. The next prime is 2121743283559. The reversal of 2121743283540 is 453823471212.

It is an interprime number because it is at equal distance from previous prime (2121743283521) and next prime (2121743283559).

It is a super-2 number, since 2×2121743283540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121743283492 and 2121743283501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 768746187 + ... + 768748946.

It is an arithmetic number, because the mean of its divisors is an integer number (129149591256).

Almost surely, 2^{2121743283540} is an apocalyptic number.

2121743283540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121743283540 is an abundant number, since it is smaller than the sum of its proper divisors (4077437096748).

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

2121743283540 is a wasteful number, since it uses less digits than its factorization.

2121743283540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537495168 (or 1537495166 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 2121743283540 in words is "two trillion, one hundred twenty-one billion, seven hundred forty-three million, two hundred eighty-three thousand, five hundred forty".