4021131430402 has 4 divisors (see below), whose sum is σ = 6031697145606. Its totient is φ = 2010565715200.

The previous prime is 4021131430399. The next prime is 4021131430411. The reversal of 4021131430402 is 2040341311204.

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., 3754948697361 + 266182733041 = 1937769^2 + 515929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005282857599 + ... + 1005282857602.

Almost surely, 2^{4021131430402} is an apocalyptic number.

4021131430402 is a deficient number, since it is larger than the sum of its proper divisors (2010565715204).

4021131430402 is a wasteful number, since it uses less digits than its factorization.

4021131430402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010565715203.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 4021131430402 its reverse (2040341311204), we get a palindrome (6061472741606).

The spelling of 4021131430402 in words is "four trillion, twenty-one billion, one hundred thirty-one million, four hundred thirty thousand, four hundred two".