420121421010 has 160 divisors (see below), whose sum is σ = 1150266896064. Its totient is φ = 109995408000.

The previous prime is 420121420981. The next prime is 420121421011. The reversal of 420121421010 is 10124121024.

420121421010 is a `hidden beast` number, since 420 + 1 + 2 + 142 + 101 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (420121421011) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 28205665 + ... + 28220555.

Almost surely, 2^420121421010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420121421010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575133448032).

420121421010 is an abundant number, since it is smaller than the sum of its proper divisors (730145475054).

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

420121421010 is a wasteful number, since it uses less digits than its factorization.

420121421010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15542 (or 15533 counting only the distinct ones).

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

Adding to 420121421010 its reverse (10124121024), we get a palindrome (430245542034).

It can be divided in two parts, 4201214 and 21010, that added together give a palindrome (4222224).

The spelling of 420121421010 in words is "four hundred twenty billion, one hundred twenty-one million, four hundred twenty-one thousand, ten".