21210103103122 has 16 divisors (see below), whose sum is σ = 32184012722400. Its totient is φ = 10482540345088.

The previous prime is 21210103103017. The next prime is 21210103103131. The reversal of 21210103103122 is 22130130101212.

It is a super-2 number, since 2×21210103103122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21210103103122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110274328 + ... + 110466499.

It is an arithmetic number, because the mean of its divisors is an integer number (2011500795150).

Almost surely, 2^{21210103103122} is an apocalyptic number.

21210103103122 is a deficient number, since it is larger than the sum of its proper divisors (10973909619278).

21210103103122 is a wasteful number, since it uses less digits than its factorization.

21210103103122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220741385.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21210103103122 its reverse (22130130101212), we get a palindrome (43340233204334).

The spelling of 21210103103122 in words is "twenty-one trillion, two hundred ten billion, one hundred three million, one hundred three thousand, one hundred twenty-two".