1213022120 has 64 divisors (see below), whose sum is σ = 2771331840. Its totient is φ = 477792000.

The previous prime is 1213022101. The next prime is 1213022143. The reversal of 1213022120 is 212203121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1213022095 and 1213022104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851729 + ... + 853151.

It is an arithmetic number, because the mean of its divisors is an integer number (43302060).

Almost surely, 2^1213022120 is an apocalyptic number.

1213022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213022120 is an abundant number, since it is smaller than the sum of its proper divisors (1558309720).

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

1213022120 is a wasteful number, since it uses less digits than its factorization.

1213022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1213022120 is about 34828.4670923083. The cubic root of 1213022120 is about 1066.4886556241.

Adding to 1213022120 its reverse (212203121), we get a palindrome (1425225241).

The spelling of 1213022120 in words is "one billion, two hundred thirteen million, twenty-two thousand, one hundred twenty".