1203420021 has 16 divisors (see below), whose sum is σ = 1700826624. Its totient is φ = 754251264.

The previous prime is 1203419999. The next prime is 1203420061. The reversal of 1203420021 is 1200243021.

It is not a de Polignac number, because 1203420021 - 2⁶ = 1203419957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203420061) 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, 35196 + ... + 60378.

It is an arithmetic number, because the mean of its divisors is an integer number (106301664).

Almost surely, 2^1203420021 is an apocalyptic number.

It is an amenable number.

1203420021 is a deficient number, since it is larger than the sum of its proper divisors (497406603).

1203420021 is a wasteful number, since it uses less digits than its factorization.

1203420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26140.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1203420021 is about 34690.3447806447. The cubic root of 1203420021 is about 1063.6671434767.

Adding to 1203420021 its reverse (1200243021), we get a palindrome (2403663042).

The spelling of 1203420021 in words is "one billion, two hundred three million, four hundred twenty thousand, twenty-one".