1201021 has 2 divisors, whose sum is σ = 1201022. Its totient is φ = 1201020.

The previous prime is 1201019. The next prime is 1201027.

1201021 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784996 + 416025 = 886^2 + 645^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1201021 - 2¹ = 1201019 is a prime.

Together with 1201019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1200995 and 1201013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600510 + 600511.

It is an arithmetic number, because the mean of its divisors is an integer number (600511).

2^1201021 is an apocalyptic number.

It is an amenable number.

1201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201021 is an equidigital number, since it uses as much as digits as its factorization.

1201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1201021 is about 1095.9110365354. The cubic root of 1201021 is about 106.2959865525.

The spelling of 1201021 in words is "one million, two hundred one thousand, twenty-one".