420121412155 has 4 divisors (see below), whose sum is σ = 504145694592. Its totient is φ = 336097129720.

The previous prime is 420121412129. The next prime is 420121412173. The reversal of 420121412155 is 551214121024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 420121412155 - 2³³ = 411531477563 is a prime.

It is a super-2 number, since 2×420121412155² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42012141211 + ... + 42012141220.

It is an arithmetic number, because the mean of its divisors is an integer number (126036423648).

Almost surely, 2^420121412155 is an apocalyptic number.

420121412155 is a deficient number, since it is larger than the sum of its proper divisors (84024282437).

420121412155 is an equidigital number, since it uses as much as digits as its factorization.

420121412155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84024282436.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 420121412155 its reverse (551214121024), we get a palindrome (971335533179).

The spelling of 420121412155 in words is "four hundred twenty billion, one hundred twenty-one million, four hundred twelve thousand, one hundred fifty-five".