1202121101220 has 96 divisors (see below), whose sum is σ = 3625061075328. Its totient is φ = 295890112512.

The previous prime is 1202121101173. The next prime is 1202121101227. The reversal of 1202121101220 is 221011212021.

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 1202121101220.

It is not an unprimeable number, because it can be changed into a prime (1202121101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19513707 + ... + 19575213.

It is an arithmetic number, because the mean of its divisors is an integer number (37761052868).

Almost surely, 2^{1202121101220} is an apocalyptic number.

1202121101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202121101220 is an abundant number, since it is smaller than the sum of its proper divisors (2422939974108).

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

1202121101220 is a wasteful number, since it uses less digits than its factorization.

1202121101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86589 (or 86587 counting only the distinct ones).

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

Adding to 1202121101220 its reverse (221011212021), we get a palindrome (1423132313241).

The spelling of 1202121101220 in words is "one trillion, two hundred two billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".