21221021121003 has 54 divisors (see below), whose sum is σ = 35791008039332. Its totient is φ = 12104682099840.

The previous prime is 21221021120977. The next prime is 21221021121059. The reversal of 21221021121003 is 30012112012212.

21221021121003 is a `hidden beast` number, since 21 + 221 + 0 + 211 + 210 + 0 + 3 = 666.

It is not a de Polignac number, because 21221021121003 - 2¹² = 21221021116907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221021121073) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 33399301 + ... + 34028742.

Almost surely, 2^{21221021121003} is an apocalyptic number.

21221021121003 is a deficient number, since it is larger than the sum of its proper divisors (14569986918329).

21221021121003 is a wasteful number, since it uses less digits than its factorization.

21221021121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67428105 (or 67428074 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21221021121003 its reverse (30012112012212), we get a palindrome (51233133133215).

The spelling of 21221021121003 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, three".