1201221022110 has 64 divisors (see below), whose sum is σ = 3033063399744. Its totient is φ = 304066483200.

The previous prime is 1201221022019. The next prime is 1201221022117. The reversal of 1201221022110 is 112201221021.

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 1201221022110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221022117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13151821 + ... + 13242840.

It is an arithmetic number, because the mean of its divisors is an integer number (47391615621).

Almost surely, 2^{1201221022110} is an apocalyptic number.

1201221022110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201221022110 is an abundant number, since it is smaller than the sum of its proper divisors (1831842377634).

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

1201221022110 is a wasteful number, since it uses less digits than its factorization.

1201221022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26394749.

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

Adding to 1201221022110 its reverse (112201221021), we get a palindrome (1313422243131).

The spelling of 1201221022110 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty-two thousand, one hundred ten".