2121020040771 has 24 divisors (see below), whose sum is σ = 3109890157920. Its totient is φ = 1392731827200.

The previous prime is 2121020040749. The next prime is 2121020040773. The reversal of 2121020040771 is 1770400201212.

It is a happy number.

2121020040771 is a `hidden beast` number, since 21 + 210 + 20 + 0 + 407 + 7 + 1 = 666.

It is not a de Polignac number, because 2121020040771 - 2²³ = 2121011652163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121020040773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 973086 + ... + 2277923.

It is an arithmetic number, because the mean of its divisors is an integer number (129578756580).

Almost surely, 2^{2121020040771} is an apocalyptic number.

2121020040771 is a deficient number, since it is larger than the sum of its proper divisors (988870117149).

2121020040771 is a wasteful number, since it uses less digits than its factorization.

2121020040771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252107 (or 3252104 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

Adding to 2121020040771 its reverse (1770400201212), we get a palindrome (3891420241983).

The spelling of 2121020040771 in words is "two trillion, one hundred twenty-one billion, twenty million, forty thousand, seven hundred seventy-one".