421052121051 has 16 divisors (see below), whose sum is σ = 563827350528. Its totient is φ = 279491139200.

The previous prime is 421052121037. The next prime is 421052121121. The reversal of 421052121051 is 150121250124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421052121051 - 2⁵ = 421052121019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421052121751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602275 + ... + 1097651.

It is an arithmetic number, because the mean of its divisors is an integer number (35239209408).

Almost surely, 2^421052121051 is an apocalyptic number.

421052121051 is a deficient number, since it is larger than the sum of its proper divisors (142775229477).

421052121051 is a wasteful number, since it uses less digits than its factorization.

421052121051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496602.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 421052121051 its reverse (150121250124), we get a palindrome (571173371175).

The spelling of 421052121051 in words is "four hundred twenty-one billion, fifty-two million, one hundred twenty-one thousand, fifty-one".