1212010221 has 8 divisors (see below), whose sum is σ = 1659689824. Its totient is φ = 786168720.

The previous prime is 1212010213. The next prime is 1212010243. The reversal of 1212010221 is 1220102121.

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

It is not a de Polignac number, because 1212010221 - 2³ = 1212010213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212010197 and 1212010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212010211) 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, 5459395 + ... + 5459616.

It is an arithmetic number, because the mean of its divisors is an integer number (207461228).

Almost surely, 2^1212010221 is an apocalyptic number.

It is an amenable number.

1212010221 is a deficient number, since it is larger than the sum of its proper divisors (447679603).

1212010221 is a wasteful number, since it uses less digits than its factorization.

1212010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10919051.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1212010221 is about 34813.9371660259. The cubic root of 1212010221 is about 1066.1920193666.

Adding to 1212010221 its reverse (1220102121), we get a palindrome (2432112342).

The spelling of 1212010221 in words is "one billion, two hundred twelve million, ten thousand, two hundred twenty-one".