21211232030 has 16 divisors (see below), whose sum is σ = 38219718240. Its totient is φ = 8475714912.

The previous prime is 21211231967. The next prime is 21211232069. The reversal of 21211232030 is 3023211212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087085 + ... + 1106424.

It is an arithmetic number, because the mean of its divisors is an integer number (2388732390).

Almost surely, 2^21211232030 is an apocalyptic number.

21211232030 is a deficient number, since it is larger than the sum of its proper divisors (17008486210).

21211232030 is a wasteful number, since it uses less digits than its factorization.

21211232030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194483.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21211232030 its reverse (3023211212), we get a palindrome (24234443242).

The spelling of 21211232030 in words is "twenty-one billion, two hundred eleven million, two hundred thirty-two thousand, thirty".