1101221403212 has 72 divisors (see below), whose sum is σ = 2340103629024. Its totient is φ = 451265810688.

The previous prime is 1101221403203. The next prime is 1101221403223. The reversal of 1101221403212 is 2123041221011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12565208 + ... + 12652544.

It is an arithmetic number, because the mean of its divisors is an integer number (32501439292).

Almost surely, 2^{1101221403212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101221403212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170051814512).

1101221403212 is an abundant number, since it is smaller than the sum of its proper divisors (1238882225812).

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

1101221403212 is a wasteful number, since it uses less digits than its factorization.

1101221403212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90175 (or 90166 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1101221403212 its reverse (2123041221011), we get a palindrome (3224262624223).

The spelling of 1101221403212 in words is "one trillion, one hundred one billion, two hundred twenty-one million, four hundred three thousand, two hundred twelve".