1301212221 has 8 divisors (see below), whose sum is σ = 1747431840. Its totient is φ = 861233712.

The previous prime is 1301212219. The next prime is 1301212229. The reversal of 1301212221 is 1222121031.

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

It is not a de Polignac number, because 1301212221 - 2¹ = 1301212219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1301212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301212229) 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, 1559790 + ... + 1560623.

It is an arithmetic number, because the mean of its divisors is an integer number (218428980).

Almost surely, 2^1301212221 is an apocalyptic number.

It is an amenable number.

1301212221 is a deficient number, since it is larger than the sum of its proper divisors (446219619).

1301212221 is a wasteful number, since it uses less digits than its factorization.

1301212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120555.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1301212221 is about 36072.3193182806. The cubic root of 1301212221 is about 1091.7320108456.

Adding to 1301212221 its reverse (1222121031), we get a palindrome (2523333252).

The spelling of 1301212221 in words is "one billion, three hundred one million, two hundred twelve thousand, two hundred twenty-one".