21103201212203 has 16 divisors (see below), whose sum is σ = 23651049945600. Its totient is φ = 18660562869600.

The previous prime is 21103201212193. The next prime is 21103201212227. The reversal of 21103201212203 is 30221210230112.

It is a cyclic number.

It is not a de Polignac number, because 21103201212203 - 2⁶ = 21103201212139 is a prime.

It is a super-2 number, since 2×21103201212203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21103201212263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6515843 + ... + 9201228.

It is an arithmetic number, because the mean of its divisors is an integer number (1478190621600).

Almost surely, 2^{21103201212203} is an apocalyptic number.

21103201212203 is a deficient number, since it is larger than the sum of its proper divisors (2547848733397).

21103201212203 is a wasteful number, since it uses less digits than its factorization.

21103201212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15720418.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21103201212203 its reverse (30221210230112), we get a palindrome (51324411442315).

The spelling of 21103201212203 in words is "twenty-one trillion, one hundred three billion, two hundred one million, two hundred twelve thousand, two hundred three".