402111021210 has 64 divisors (see below), whose sum is σ = 979771852800. Its totient is φ = 105599108160.

The previous prime is 402111021181. The next prime is 402111021229. The reversal of 402111021210 is 12120111204.

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

It is a self number, because there is not a number n which added to its sum of digits gives 402111021210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1773891 + ... + 1987689.

It is an arithmetic number, because the mean of its divisors is an integer number (15308935200).

Almost surely, 2^402111021210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402111021210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489885926400).

402111021210 is an abundant number, since it is smaller than the sum of its proper divisors (577660831590).

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

402111021210 is a wasteful number, since it uses less digits than its factorization.

402111021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214763.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 402111021210 its reverse (12120111204), we get a palindrome (414231132414).

The spelling of 402111021210 in words is "four hundred two billion, one hundred eleven million, twenty-one thousand, two hundred ten".