2021552345342 has 16 divisors (see below), whose sum is σ = 3046387344000. Its totient is φ = 1006091269632.

The previous prime is 2021552345341. The next prime is 2021552345347. The reversal of 2021552345342 is 2435432551202.

It is a junction number, because it is equal to n+sod(n) for n = 2021552345296 and 2021552345305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021552345341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2636534 + ... + 3315782.

It is an arithmetic number, because the mean of its divisors is an integer number (190399209000).

Almost surely, 2^{2021552345342} is an apocalyptic number.

2021552345342 is a deficient number, since it is larger than the sum of its proper divisors (1024834998658).

2021552345342 is a wasteful number, since it uses less digits than its factorization.

2021552345342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686147.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 2021552345342 its reverse (2435432551202), we get a palindrome (4456984896544).

The spelling of 2021552345342 in words is "two trillion, twenty-one billion, five hundred fifty-two million, three hundred forty-five thousand, three hundred forty-two".