421020123030 has 512 divisors, whose sum is σ = 1314995834880. Its totient is φ = 94924431360.

The previous prime is 421020123019. The next prime is 421020123037. The reversal of 421020123030 is 30321020124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421020122994 and 421020123012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421020123037) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 374906049 + ... + 374907171.

It is an arithmetic number, because the mean of its divisors is an integer number (2568351240).

Almost surely, 2^421020123030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421020123030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657497917440).

421020123030 is an abundant number, since it is smaller than the sum of its proper divisors (893975711850).

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

421020123030 is a wasteful number, since it uses less digits than its factorization.

421020123030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 421020123030 its reverse (30321020124), we get a palindrome (451341143154).

The spelling of 421020123030 in words is "four hundred twenty-one billion, twenty million, one hundred twenty-three thousand, thirty".