420012121140 has 72 divisors (see below), whose sum is σ = 1275015251328. Its totient is φ = 111917211840.

The previous prime is 420012121129. The next prime is 420012121141. The reversal of 420012121140 is 41121210024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420012121141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 660856 + ... + 1129935.

Almost surely, 2^420012121140 is an apocalyptic number.

It is an amenable number.

420012121140 is an abundant number, since it is smaller than the sum of its proper divisors (855003130188).

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

420012121140 is a wasteful number, since it uses less digits than its factorization.

420012121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792109 (or 1792104 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 420012121140 its reverse (41121210024), we get a palindrome (461133331164).

The spelling of 420012121140 in words is "four hundred twenty billion, twelve million, one hundred twenty-one thousand, one hundred forty".