1212001120 has 48 divisors (see below), whose sum is σ = 3123661968. Its totient is φ = 440727040.

The previous prime is 1212001039. The next prime is 1212001121. The reversal of 1212001120 is 211002121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1212001097 and 1212001106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342559 + ... + 346078.

It is an arithmetic number, because the mean of its divisors is an integer number (65076291).

Almost surely, 2^1212001120 is an apocalyptic number.

1212001120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212001120 is an abundant number, since it is smaller than the sum of its proper divisors (1911660848).

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

1212001120 is a wasteful number, since it uses less digits than its factorization.

1212001120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688663 (or 688655 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1212001120 is about 34813.8064566344. The cubic root of 1212001120 is about 1066.1893506768.

Adding to 1212001120 its reverse (211002121), we get a palindrome (1423003241).

It can be divided in two parts, 1212001 and 120, that added together give a palindrome (1212121).

The spelling of 1212001120 in words is "one billion, two hundred twelve million, one thousand, one hundred twenty".