1214045221 has 8 divisors (see below), whose sum is σ = 1247658104. Its totient is φ = 1180474560.

The previous prime is 1214045213. The next prime is 1214045237. The reversal of 1214045221 is 1225404121.

It can be written as a sum of positive squares in 4 ways, for example, as 511212100 + 702833121 = 22610^2 + 26511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1214045221 - 2³ = 1214045213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1214045192 and 1214045201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214045201) 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, 52951 + ... + 72331.

It is an arithmetic number, because the mean of its divisors is an integer number (155957263).

Almost surely, 2^1214045221 is an apocalyptic number.

It is an amenable number.

1214045221 is a deficient number, since it is larger than the sum of its proper divisors (33612883).

1214045221 is a wasteful number, since it uses less digits than its factorization.

1214045221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1214045221 is about 34843.1517087648. The cubic root of 1214045221 is about 1066.7884080558.

Adding to 1214045221 its reverse (1225404121), we get a palindrome (2439449342).

The spelling of 1214045221 in words is "one billion, two hundred fourteen million, forty-five thousand, two hundred twenty-one".