6401220111102 has 32 divisors (see below), whose sum is σ = 13367528974080. Its totient is φ = 2039676091200.

The previous prime is 6401220111089. The next prime is 6401220111151. The reversal of 6401220111102 is 2011110221046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14470399 + ... + 14906202.

It is an arithmetic number, because the mean of its divisors is an integer number (417735280440).

Almost surely, 2^{6401220111102} is an apocalyptic number.

6401220111102 is an abundant number, since it is smaller than the sum of its proper divisors (6966308862978).

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

6401220111102 is a wasteful number, since it uses less digits than its factorization.

6401220111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29378208.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 6401220111102 its reverse (2011110221046), we get a palindrome (8412330332148).

The spelling of 6401220111102 in words is "six trillion, four hundred one billion, two hundred twenty million, one hundred eleven thousand, one hundred two".