1203401021 has 2 divisors, whose sum is σ = 1203401022. Its totient is φ = 1203401020.

The previous prime is 1203400999. The next prime is 1203401027. The reversal of 1203401021 is 1201043021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661209796 + 542191225 = 25714^2 + 23285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203401021 - 2¹⁸ = 1203138877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203400987 and 1203401005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203401027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601700510 + 601700511.

It is an arithmetic number, because the mean of its divisors is an integer number (601700511).

Almost surely, 2^1203401021 is an apocalyptic number.

It is an amenable number.

1203401021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203401021 is an equidigital number, since it uses as much as digits as its factorization.

1203401021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1203401021 is about 34690.0709281489. The cubic root of 1203401021 is about 1063.6615456024.

Adding to 1203401021 its reverse (1201043021), we get a palindrome (2404444042).

The spelling of 1203401021 in words is "one billion, two hundred three million, four hundred one thousand, twenty-one".