1021040004455 has 4 divisors (see below), whose sum is σ = 1225248005352. Its totient is φ = 816832003560.

The previous prime is 1021040004449. The next prime is 1021040004473. The reversal of 1021040004455 is 5544000401201.

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

It is not a de Polignac number, because 1021040004455 - 2¹² = 1021040000359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102104000441 + ... + 102104000450.

It is an arithmetic number, because the mean of its divisors is an integer number (306312001338).

Almost surely, 2^{1021040004455} is an apocalyptic number.

1021040004455 is a deficient number, since it is larger than the sum of its proper divisors (204208000897).

1021040004455 is an equidigital number, since it uses as much as digits as its factorization.

1021040004455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204208000896.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 1021040004455 its reverse (5544000401201), we get a palindrome (6565040405656).

The spelling of 1021040004455 in words is "one trillion, twenty-one billion, forty million, four thousand, four hundred fifty-five".