1302121312220 has 96 divisors (see below), whose sum is σ = 2811309814656. Its totient is φ = 506422656000.

The previous prime is 1302121312211. The next prime is 1302121312241. The reversal of 1302121312220 is 222131212031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1302121312192 and 1302121312201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79715174 + ... + 79731506.

It is an arithmetic number, because the mean of its divisors is an integer number (29284477236).

Almost surely, 2^{1302121312220} is an apocalyptic number.

1302121312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302121312220 is an abundant number, since it is smaller than the sum of its proper divisors (1509188502436).

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

1302121312220 is a wasteful number, since it uses less digits than its factorization.

1302121312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17151 (or 17149 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1302121312220 its reverse (222131212031), we get a palindrome (1524252524251).

The spelling of 1302121312220 in words is "one trillion, three hundred two billion, one hundred twenty-one million, three hundred twelve thousand, two hundred twenty".