421223155501 has 8 divisors (see below), whose sum is σ = 425662121664. Its totient is φ = 416803962720.

The previous prime is 421223155487. The next prime is 421223155519. The reversal of 421223155501 is 105551322124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421223155501 - 2¹⁷ = 421223024429 is a prime.

It is a super-2 number, since 2×421223155501² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421223185501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4900515 + ... + 4985728.

It is an arithmetic number, because the mean of its divisors is an integer number (53207765208).

Almost surely, 2^421223155501 is an apocalyptic number.

It is an amenable number.

421223155501 is a deficient number, since it is larger than the sum of its proper divisors (4438966163).

421223155501 is a wasteful number, since it uses less digits than its factorization.

421223155501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886691.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 421223155501 its reverse (105551322124), we get a palindrome (526774477625).

The spelling of 421223155501 in words is "four hundred twenty-one billion, two hundred twenty-three million, one hundred fifty-five thousand, five hundred one".