10202121111103 has 4 divisors (see below), whose sum is σ = 10217744574408. Its totient is φ = 10186497647800.

The previous prime is 10202121111089. The next prime is 10202121111107. The reversal of 10202121111103 is 30111112120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10202121111103 is a prime.

It is a super-2 number, since 2×10202121111103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121111107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7811730673 + ... + 7811731978.

It is an arithmetic number, because the mean of its divisors is an integer number (2554436143602).

Almost surely, 2^{10202121111103} is an apocalyptic number.

10202121111103 is a deficient number, since it is larger than the sum of its proper divisors (15623463305).

10202121111103 is an equidigital number, since it uses as much as digits as its factorization.

10202121111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15623463304.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 10202121111103 its reverse (30111112120201), we get a palindrome (40313233231304).

The spelling of 10202121111103 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred three".