21121223410 has 16 divisors (see below), whose sum is σ = 43449374016. Its totient is φ = 7241562288.

The previous prime is 21121223293. The next prime is 21121223443. The reversal of 21121223410 is 1432212112.

It is a super-2 number, since 2×21121223410² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150865812 + ... + 150865951.

It is an arithmetic number, because the mean of its divisors is an integer number (2715585876).

Almost surely, 2^21121223410 is an apocalyptic number.

21121223410 is an abundant number, since it is smaller than the sum of its proper divisors (22328150606).

21121223410 is a wasteful number, since it uses less digits than its factorization.

21121223410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301731777.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21121223410 its reverse (1432212112), we get a palindrome (22553435522).

The spelling of 21121223410 in words is "twenty-one billion, one hundred twenty-one million, two hundred twenty-three thousand, four hundred ten".