355121120 has 48 divisors (see below), whose sum is σ = 866049408. Its totient is φ = 137464320.

The previous prime is 355121119. The next prime is 355121141. The reversal of 355121120 is 21121553.

It is a happy number.

It is a super-2 number, since 2×355121120² = 252222019740108800, which contains 22 as substring.

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 = 355121092 and 355121101.

It is a congruent number.

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, 30839 + ... + 40758.

It is an arithmetic number, because the mean of its divisors is an integer number (18042696).

Almost surely, 2^355121120 is an apocalyptic number.

It is an amenable number.

355121120 is an abundant number, since it is smaller than the sum of its proper divisors (510928288).

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

355121120 is a wasteful number, since it uses less digits than its factorization.

355121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71643 (or 71635 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 355121120 is about 18844.6575983752. The cubic root of 355121120 is about 708.1503931101.

Adding to 355121120 its reverse (21121553), we get a palindrome (376242673).

The spelling of 355121120 in words is "three hundred fifty-five million, one hundred twenty-one thousand, one hundred twenty".