400210021050 has 144 divisors (see below), whose sum is σ = 1155212749152. Its totient is φ = 91425264000.

The previous prime is 400210021033. The next prime is 400210021103. The reversal of 400210021050 is 50120012004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13958029 + ... + 13986671.

It is an arithmetic number, because the mean of its divisors is an integer number (8022310758).

Almost surely, 2^400210021050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400210021050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577606374576).

400210021050 is an abundant number, since it is smaller than the sum of its proper divisors (755002728102).

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

400210021050 is a wasteful number, since it uses less digits than its factorization.

400210021050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30573 (or 30561 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 400210021050 its reverse (50120012004), we get a palindrome (450330033054).

The spelling of 400210021050 in words is "four hundred billion, two hundred ten million, twenty-one thousand, fifty".