421021455042 has 32 divisors (see below), whose sum is σ = 878889921408. Its totient is φ = 134202600576.

The previous prime is 421021455013. The next prime is 421021455109. The reversal of 421021455042 is 240554120124.

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, 106518 + ... + 923790.

It is an arithmetic number, because the mean of its divisors is an integer number (27465310044).

Almost surely, 2^421021455042 is an apocalyptic number.

421021455042 is an abundant number, since it is smaller than the sum of its proper divisors (457868466366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421021455042 is a wasteful number, since it uses less digits than its factorization.

421021455042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821034.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 421021455042 its reverse (240554120124), we get a palindrome (661575575166).

The spelling of 421021455042 in words is "four hundred twenty-one billion, twenty-one million, four hundred fifty-five thousand, forty-two".