1203212421 has 16 divisors (see below), whose sum is σ = 1783566400. Its totient is φ = 801678384.

The previous prime is 1203212371. The next prime is 1203212431. The reversal of 1203212421 is 1242123021.

It is a happy number.

It is not a de Polignac number, because 1203212421 - 2⁶ = 1203212357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203212394 and 1203212403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203212431) 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, 38475 + ... + 62343.

It is an arithmetic number, because the mean of its divisors is an integer number (111472900).

Almost surely, 2^1203212421 is an apocalyptic number.

It is an amenable number.

1203212421 is a deficient number, since it is larger than the sum of its proper divisors (580353979).

1203212421 is a wasteful number, since it uses less digits than its factorization.

1203212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25745 (or 25739 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1203212421 is about 34687.3524645511. The cubic root of 1203212421 is about 1063.6059761386.

Adding to 1203212421 its reverse (1242123021), we get a palindrome (2445335442).

The spelling of 1203212421 in words is "one billion, two hundred three million, two hundred twelve thousand, four hundred twenty-one".