1021204420406 has 32 divisors (see below), whose sum is σ = 1614217519200. Its totient is φ = 483191930880.

The previous prime is 1021204420363. The next prime is 1021204420429. The reversal of 1021204420406 is 6040244021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171541526 + ... + 171547478.

It is an arithmetic number, because the mean of its divisors is an integer number (50444297475).

Almost surely, 2^{1021204420406} is an apocalyptic number.

1021204420406 is a deficient number, since it is larger than the sum of its proper divisors (593013098794).

1021204420406 is a wasteful number, since it uses less digits than its factorization.

1021204420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10224.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1021204420406 its reverse (6040244021201), we get a palindrome (7061448441607).

The spelling of 1021204420406 in words is "one trillion, twenty-one billion, two hundred four million, four hundred twenty thousand, four hundred six".