2100421340043 has 16 divisors (see below), whose sum is σ = 3039737573376. Its totient is φ = 1282389282720.

The previous prime is 2100421340027. The next prime is 2100421340051. The reversal of 2100421340043 is 3400431240012.

It is not a de Polignac number, because 2100421340043 - 2⁴ = 2100421340027 is a prime.

It is a super-3 number, since 3×2100421340043³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100421339995 and 2100421340022.

It is not an unprimeable number, because it can be changed into a prime (2100421340063) 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, 212030313 + ... + 212040218.

It is an arithmetic number, because the mean of its divisors is an integer number (189983598336).

Almost surely, 2^{2100421340043} is an apocalyptic number.

2100421340043 is a deficient number, since it is larger than the sum of its proper divisors (939316233333).

2100421340043 is a wasteful number, since it uses less digits than its factorization.

2100421340043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424070674.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 2100421340043 its reverse (3400431240012), we get a palindrome (5500852580055).

The spelling of 2100421340043 in words is "two trillion, one hundred billion, four hundred twenty-one million, three hundred forty thousand, forty-three".