1301221021 has 8 divisors (see below), whose sum is σ = 1437666624. Its totient is φ = 1171431360.

The previous prime is 1301221007. The next prime is 1301221037. The reversal of 1301221021 is 1201221031.

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 1301221021 - 2²⁹ = 764350109 is a prime.

It is a super-2 number, since 2×1301221021² = 3386352290984564882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301220992 and 1301221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663575 + ... + 1664356.

It is an arithmetic number, because the mean of its divisors is an integer number (179708328).

Almost surely, 2^1301221021 is an apocalyptic number.

It is an amenable number.

1301221021 is a deficient number, since it is larger than the sum of its proper divisors (136445603).

1301221021 is a wasteful number, since it uses less digits than its factorization.

1301221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327971.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1301221021 is about 36072.4412952603. The cubic root of 1301221021 is about 1091.7344719404.

Adding to 1301221021 its reverse (1201221031), we get a palindrome (2502442052).

The spelling of 1301221021 in words is "one billion, three hundred one million, two hundred twenty-one thousand, twenty-one".