1020121320 has 32 divisors (see below), whose sum is σ = 3060364320. Its totient is φ = 272032320.

The previous prime is 1020121307. The next prime is 1020121367. The reversal of 1020121320 is 231210201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020121296 and 1020121305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4250386 + ... + 4250625.

It is an arithmetic number, because the mean of its divisors is an integer number (95636385).

Almost surely, 2^1020121320 is an apocalyptic number.

1020121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020121320 is an abundant number, since it is smaller than the sum of its proper divisors (2040243000).

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

1020121320 is a wasteful number, since it uses less digits than its factorization.

1020121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501025 (or 8501021 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1020121320 is about 31939.3381271435. The cubic root of 1020121320 is about 1006.6626176077.

Adding to 1020121320 its reverse (231210201), we get a palindrome (1251331521).

The spelling of 1020121320 in words is "one billion, twenty million, one hundred twenty-one thousand, three hundred twenty".