2021310402442 has 4 divisors (see below), whose sum is σ = 3031965603666. Its totient is φ = 1010655201220.

The previous prime is 2021310402431. The next prime is 2021310402451. The reversal of 2021310402442 is 2442040131202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1427114555161 + 594195847281 = 1194619^2 + 770841^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505327600609 + ... + 505327600612.

Almost surely, 2^{2021310402442} is an apocalyptic number.

2021310402442 is a deficient number, since it is larger than the sum of its proper divisors (1010655201224).

2021310402442 is a wasteful number, since it uses less digits than its factorization.

2021310402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010655201223.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 2021310402442 its reverse (2442040131202), we get a palindrome (4463350533644).

The spelling of 2021310402442 in words is "two trillion, twenty-one billion, three hundred ten million, four hundred two thousand, four hundred forty-two".