1020121011103 has 4 divisors (see below), whose sum is σ = 1020123042328. Its totient is φ = 1020118979880.

The previous prime is 1020121011067. The next prime is 1020121011109. The reversal of 1020121011103 is 3011101210201.

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-1020121011103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121011109) 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, 348025 + ... + 1470157.

It is an arithmetic number, because the mean of its divisors is an integer number (255030760582).

Almost surely, 2^{1020121011103} is an apocalyptic number.

1020121011103 is a deficient number, since it is larger than the sum of its proper divisors (2031225).

1020121011103 is an equidigital number, since it uses as much as digits as its factorization.

1020121011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031224.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1020121011103 its reverse (3011101210201), we get a palindrome (4031222221304).

The spelling of 1020121011103 in words is "one trillion, twenty billion, one hundred twenty-one million, eleven thousand, one hundred three".