421155105111440 has 160 divisors (see below), whose sum is σ = 1182314414653440. Its totient is φ = 136291460544000.

The previous prime is 421155105111407. The next prime is 421155105111451. The reversal of 421155105111440 is 44111501551124.

It is a happy number.

It is a super-2 number, since 2×421155105111440² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 421155105111440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70146536 + ... + 75913415.

It is an arithmetic number, because the mean of its divisors is an integer number (7389465091584).

Almost surely, 2^{421155105111440} is an apocalyptic number.

421155105111440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421155105111440 is an abundant number, since it is smaller than the sum of its proper divisors (761159309542000).

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

421155105111440 is a wasteful number, since it uses less digits than its factorization.

421155105111440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146060261 (or 146060255 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 35.

Adding to 421155105111440 its reverse (44111501551124), we get a palindrome (465266606662564).

The spelling of 421155105111440 in words is "four hundred twenty-one trillion, one hundred fifty-five billion, one hundred five million, one hundred eleven thousand, four hundred forty".