1201301021 has 4 divisors (see below), whose sum is σ = 1223967132. Its totient is φ = 1178634912.

The previous prime is 1201301009. The next prime is 1201301033. The reversal of 1201301021 is 1201031021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201031021 = 19 ⋅63212159.

It is an interprime number because it is at equal distance from previous prime (1201301009) and next prime (1201301033).

It can be written as a sum of positive squares in 2 ways, for example, as 1040772121 + 160528900 = 32261^2 + 12670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201301021 - 2¹⁰ = 1201299997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201300993 and 1201301011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201381021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11332976 + ... + 11333081.

It is an arithmetic number, because the mean of its divisors is an integer number (305991783).

Almost surely, 2^1201301021 is an apocalyptic number.

It is an amenable number.

1201301021 is a deficient number, since it is larger than the sum of its proper divisors (22666111).

1201301021 is an equidigital number, since it uses as much as digits as its factorization.

1201301021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22666110.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201301021 is about 34659.7896848784. The cubic root of 1201301021 is about 1063.0424696748.

Adding to 1201301021 its reverse (1201031021), we get a palindrome (2402332042).

The spelling of 1201301021 in words is "one billion, two hundred one million, three hundred one thousand, twenty-one".