1203220421 has 8 divisors (see below), whose sum is σ = 1296852480. Its totient is φ = 1109742192.

The previous prime is 1203220409. The next prime is 1203220423. The reversal of 1203220421 is 1240223021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1203220421 - 2⁶ = 1203220357 is a prime.

It is a super-2 number, since 2×1203220421² = 2895478763022834482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203220421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21941 + ... + 53738.

It is an arithmetic number, because the mean of its divisors is an integer number (162106560).

Almost surely, 2^1203220421 is an apocalyptic number.

It is an amenable number.

1203220421 is a deficient number, since it is larger than the sum of its proper divisors (93632059).

1203220421 is a wasteful number, since it uses less digits than its factorization.

1203220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76915.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1203220421 is about 34687.4677801652. The cubic root of 1203220421 is about 1063.6083333918.

Adding to 1203220421 its reverse (1240223021), we get a palindrome (2443443442).

The spelling of 1203220421 in words is "one billion, two hundred three million, two hundred twenty thousand, four hundred twenty-one".