1212401120 has 72 divisors (see below), whose sum is σ = 3331959624. Its totient is φ = 415677696.

The previous prime is 1212401117. The next prime is 1212401123. The reversal of 1212401120 is 211042121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212401117) and next prime (1212401123).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1212401095 and 1212401104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212401123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69482 + ... + 85161.

It is an arithmetic number, because the mean of its divisors is an integer number (46277217).

Almost surely, 2^1212401120 is an apocalyptic number.

1212401120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212401120 is an abundant number, since it is smaller than the sum of its proper divisors (2119558504).

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

1212401120 is a wasteful number, since it uses less digits than its factorization.

1212401120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154672 (or 154657 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1212401120 is about 34819.5508299576. The cubic root of 1212401120 is about 1066.3066302252.

Adding to 1212401120 its reverse (211042121), we get a palindrome (1423443241).

The spelling of 1212401120 in words is "one billion, two hundred twelve million, four hundred one thousand, one hundred twenty".