121020122320 has 20 divisors (see below), whose sum is σ = 281371784580. Its totient is φ = 48408048896.

The previous prime is 121020122273. The next prime is 121020122339. The reversal of 121020122320 is 23221020121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32104038976 + 88916083344 = 179176^2 + 298188^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 = 121020122294 and 121020122303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756375685 + ... + 756375844.

It is an arithmetic number, because the mean of its divisors is an integer number (14068589229).

Almost surely, 2^121020122320 is an apocalyptic number.

121020122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020122320 is an abundant number, since it is smaller than the sum of its proper divisors (160351662260).

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

121020122320 is a wasteful number, since it uses less digits than its factorization.

121020122320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512751542 (or 1512751536 counting only the distinct ones).

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

Adding to 121020122320 its reverse (23221020121), we get a palindrome (144241142441).

The spelling of 121020122320 in words is "one hundred twenty-one billion, twenty million, one hundred twenty-two thousand, three hundred twenty".