1301230021 has 16 divisors (see below), whose sum is σ = 1603969024. Its totient is φ = 1027966464.

The previous prime is 1301229989. The next prime is 1301230039. The reversal of 1301230021 is 1200321031.

It is not a de Polignac number, because 1301230021 - 2⁵ = 1301229989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1301229983 and 1301230010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301230061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50620 + ... + 71866.

It is an arithmetic number, because the mean of its divisors is an integer number (100248064).

Almost surely, 2^1301230021 is an apocalyptic number.

It is an amenable number.

1301230021 is a deficient number, since it is larger than the sum of its proper divisors (302739003).

1301230021 is a wasteful number, since it uses less digits than its factorization.

1301230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21940.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1301230021 is about 36072.5660440174. The cubic root of 1301230021 is about 1091.7369889577.

Adding to 1301230021 its reverse (1200321031), we get a palindrome (2501551052).

The spelling of 1301230021 in words is "one billion, three hundred one million, two hundred thirty thousand, twenty-one".