1221120011202 has 128 divisors (see below), whose sum is σ = 3094224290304. Its totient is φ = 312623566848.

The previous prime is 1221120011201. The next prime is 1221120011281. The reversal of 1221120011202 is 2021100211221.

It is a super-2 number, since 2×1221120011202² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221120011201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8677668 + ... + 8817264.

It is an arithmetic number, because the mean of its divisors is an integer number (24173627268).

Almost surely, 2^{1221120011202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221120011202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547112145152).

1221120011202 is an abundant number, since it is smaller than the sum of its proper divisors (1873104279102).

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

1221120011202 is a wasteful number, since it uses less digits than its factorization.

1221120011202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140092.

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

Adding to 1221120011202 its reverse (2021100211221), we get a palindrome (3242220222423).

The spelling of 1221120011202 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, eleven thousand, two hundred two".