1214020121 has 4 divisors (see below), whose sum is σ = 1214249652. Its totient is φ = 1213790592.

The previous prime is 1214020111. The next prime is 1214020139. The reversal of 1214020121 is 1210204121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1210204121 = 7 ⋅172886303.

It can be written as a sum of positive squares in 2 ways, for example, as 388090000 + 825930121 = 19700^2 + 28739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214020121 - 2¹⁴ = 1214003737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1214020096 and 1214020105.

It is not an unprimeable number, because it can be changed into a prime (1214020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106640 + ... + 117473.

It is an arithmetic number, because the mean of its divisors is an integer number (303562413).

Almost surely, 2^1214020121 is an apocalyptic number.

It is an amenable number.

1214020121 is a deficient number, since it is larger than the sum of its proper divisors (229531).

1214020121 is an equidigital number, since it uses as much as digits as its factorization.

1214020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229530.

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

The square root of 1214020121 is about 34842.7915213463. The cubic root of 1214020121 is about 1066.7810561677.

Adding to 1214020121 its reverse (1210204121), we get a palindrome (2424224242).

The spelling of 1214020121 in words is "one billion, two hundred fourteen million, twenty thousand, one hundred twenty-one".