1202021421 has 8 divisors (see below), whose sum is σ = 1602873504. Its totient is φ = 801258480.

The previous prime is 1202021417. The next prime is 1202021501. The reversal of 1202021421 is 1241202021.

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

It is not a de Polignac number, because 1202021421 - 2² = 1202021417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202021421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202021321) 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, 21435 + ... + 53511.

It is an arithmetic number, because the mean of its divisors is an integer number (200359188).

Almost surely, 2^1202021421 is an apocalyptic number.

It is an amenable number.

1202021421 is a deficient number, since it is larger than the sum of its proper divisors (400852083).

1202021421 is a wasteful number, since it uses less digits than its factorization.

1202021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44571.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1202021421 is about 34670.1805735130. The cubic root of 1202021421 is about 1063.2549234369.

Adding to 1202021421 its reverse (1241202021), we get a palindrome (2443223442).

The spelling of 1202021421 in words is "one billion, two hundred two million, twenty-one thousand, four hundred twenty-one".