207121943961243 has 24 divisors (see below), whose sum is σ = 303784080334800. Its totient is φ = 135956490937344.

The previous prime is 207121943961223. The next prime is 207121943961277. The reversal of 207121943961243 is 342169349121702.

207121943961243 is a `hidden beast` number, since 2 + 0 + 7 + 1 + 2 + 1 + 9 + 4 + 396 + 1 + 243 = 666.

It is not a de Polignac number, because 207121943961243 - 2⁹ = 207121943960731 is a prime.

It is a super-2 number, since 2×207121943961243² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 207121943961243.

It is not an unprimeable number, because it can be changed into a prime (207121943961223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79384558 + ... + 81952131.

It is an arithmetic number, because the mean of its divisors is an integer number (12657670013950).

Almost surely, 2^{207121943961243} is an apocalyptic number.

207121943961243 is a deficient number, since it is larger than the sum of its proper divisors (96662136373557).

207121943961243 is a wasteful number, since it uses less digits than its factorization.

207121943961243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161338891 (or 161338888 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 207121943961243 in words is "two hundred seven trillion, one hundred twenty-one billion, nine hundred forty-three million, nine hundred sixty-one thousand, two hundred forty-three".