1321023101420 has 96 divisors (see below), whose sum is σ = 3237399627840. Its totient is φ = 447453757440.

The previous prime is 1321023101399. The next prime is 1321023101429. The reversal of 1321023101420 is 241013201231.

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 = 1321023101392 and 1321023101401.

It is not an unprimeable number, because it can be changed into a prime (1321023101429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1457915 + ... + 2183474.

It is an arithmetic number, because the mean of its divisors is an integer number (33722912790).

Almost surely, 2^{1321023101420} is an apocalyptic number.

1321023101420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321023101420 is an abundant number, since it is smaller than the sum of its proper divisors (1916376526420).

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

1321023101420 is a wasteful number, since it uses less digits than its factorization.

1321023101420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641523 (or 3641521 counting only the distinct ones).

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

Adding to 1321023101420 its reverse (241013201231), we get a palindrome (1562036302651).

The spelling of 1321023101420 in words is "one trillion, three hundred twenty-one billion, twenty-three million, one hundred one thousand, four hundred twenty".