21122220003 has 8 divisors (see below), whose sum is σ = 28252938768. Its totient is φ = 14036490624.

The previous prime is 21122219999. The next prime is 21122220043. The reversal of 21122220003 is 30002222112.

It is a happy number.

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

It is not a de Polignac number, because 21122220003 - 2² = 21122219999 is a prime.

It is a super-2 number, since 2×21122220003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122220043) 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, 11246250 + ... + 11248127.

It is an arithmetic number, because the mean of its divisors is an integer number (3531617346).

Almost surely, 2^21122220003 is an apocalyptic number.

21122220003 is a deficient number, since it is larger than the sum of its proper divisors (7130718765).

21122220003 is a wasteful number, since it uses less digits than its factorization.

21122220003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22494693.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21122220003 its reverse (30002222112), we get a palindrome (51124442115).

The spelling of 21122220003 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, three".