400423122021412 has 24 divisors (see below), whose sum is σ = 800997948495360. Its totient is φ = 171577401340800.

The previous prime is 400423122021401. The next prime is 400423122021413. The reversal of 400423122021412 is 214120221324004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (400423122021413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1354353589 + ... + 1354649212.

It is an arithmetic number, because the mean of its divisors is an integer number (33374914520640).

Almost surely, 2^{400423122021412} is an apocalyptic number.

It is an amenable number.

400423122021412 is an abundant number, since it is smaller than the sum of its proper divisors (400574826473948).

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

400423122021412 is a wasteful number, since it uses less digits than its factorization.

400423122021412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709008091 (or 2709008089 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 400423122021412 its reverse (214120221324004), we get a palindrome (614543343345416).

The spelling of 400423122021412 in words is "four hundred trillion, four hundred twenty-three billion, one hundred twenty-two million, twenty-one thousand, four hundred twelve".