30503211553221 has 32 divisors (see below), whose sum is σ = 45207453998592. Its totient is φ = 18137181591360.

The previous prime is 30503211553211. The next prime is 30503211553237. The reversal of 30503211553221 is 12235511230503.

It is not a de Polignac number, because 30503211553221 - 2⁷ = 30503211553093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30503211553211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40206226 + ... + 40957868.

It is an arithmetic number, because the mean of its divisors is an integer number (1412732937456).

Almost surely, 2^{30503211553221} is an apocalyptic number.

It is an amenable number.

30503211553221 is a deficient number, since it is larger than the sum of its proper divisors (14704242445371).

30503211553221 is a wasteful number, since it uses less digits than its factorization.

30503211553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774913.

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 30503211553221 its reverse (12235511230503), we get a palindrome (42738722783724).

The spelling of 30503211553221 in words is "thirty trillion, five hundred three billion, two hundred eleven million, five hundred fifty-three thousand, two hundred twenty-one".