203121321414421 has 16 divisors (see below), whose sum is σ = 225187380144000. Its totient is φ = 182520297546048.

The previous prime is 203121321414413. The next prime is 203121321414433. The reversal of 203121321414421 is 124414123121302.

It is a cyclic number.

It is not a de Polignac number, because 203121321414421 - 2³ = 203121321414413 is a prime.

It is a super-2 number, since 2×203121321414421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203121321414491) 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, 4115241771 + ... + 4115291128.

It is an arithmetic number, because the mean of its divisors is an integer number (14074211259000).

Almost surely, 2^{203121321414421} is an apocalyptic number.

It is an amenable number.

203121321414421 is a deficient number, since it is larger than the sum of its proper divisors (22066058729579).

203121321414421 is a wasteful number, since it uses less digits than its factorization.

203121321414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230532988.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 203121321414421 its reverse (124414123121302), we get a palindrome (327535444535723).

The spelling of 203121321414421 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred twenty-one million, four hundred fourteen thousand, four hundred twenty-one".