1220101400320 has 144 divisors (see below), whose sum is σ = 3298147463520. Its totient is φ = 428374016000.

The previous prime is 1220101400311. The next prime is 1220101400321. The reversal of 1220101400320 is 230041010221.

It is a super-2 number, since 2×1220101400320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1220101400294 and 1220101400303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220101400321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1085731 + ... + 1902370.

It is an arithmetic number, because the mean of its divisors is an integer number (22903801830).

Almost surely, 2^{1220101400320} is an apocalyptic number.

1220101400320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220101400320 is an abundant number, since it is smaller than the sum of its proper divisors (2078046063200).

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

1220101400320 is a wasteful number, since it uses less digits than its factorization.

1220101400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988162 (or 2988148 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1220101400320 its reverse (230041010221), we get a palindrome (1450142410541).

The spelling of 1220101400320 in words is "one trillion, two hundred twenty billion, one hundred one million, four hundred thousand, three hundred twenty".