21012222010203 has 12 divisors (see below), whose sum is σ = 30364293378328. Its totient is φ = 14002006762080.

The previous prime is 21012222010183. The next prime is 21012222010261. The reversal of 21012222010203 is 30201022221012.

21012222010203 is a `hidden beast` number, since 210 + 1 + 22 + 220 + 10 + 203 = 666.

It is not a de Polignac number, because 21012222010203 - 2¹⁰ = 21012222009179 is a prime.

It is a super-2 number, since 2×21012222010203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012222110203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511748725 + ... + 511789782.

Almost surely, 2^{21012222010203} is an apocalyptic number.

21012222010203 is a deficient number, since it is larger than the sum of its proper divisors (9352071368125).

21012222010203 is a wasteful number, since it uses less digits than its factorization.

21012222010203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023540794 (or 1023540791 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21012222010203 its reverse (30201022221012), we get a palindrome (51213244231215).

The spelling of 21012222010203 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, ten thousand, two hundred three".