21203003223031 has 32 divisors (see below), whose sum is σ = 25599664516608. Its totient is φ = 17183376858240.

The previous prime is 21203003222977. The next prime is 21203003223049. The reversal of 21203003223031 is 13032230030212.

It is a cyclic number.

It is not a de Polignac number, because 21203003223031 - 2⁷ = 21203003222903 is a prime.

It is a super-2 number, since 2×21203003223031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203003222993 and 21203003223011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203003223431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6773305 + ... + 9395938.

It is an arithmetic number, because the mean of its divisors is an integer number (799989516144).

Almost surely, 2^{21203003223031} is an apocalyptic number.

21203003223031 is a deficient number, since it is larger than the sum of its proper divisors (4396661293577).

21203003223031 is a wasteful number, since it uses less digits than its factorization.

21203003223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16169431.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21203003223031 its reverse (13032230030212), we get a palindrome (34235233253243).

The spelling of 21203003223031 in words is "twenty-one trillion, two hundred three billion, three million, two hundred twenty-three thousand, thirty-one".