1021121434123 has 16 divisors (see below), whose sum is σ = 1197235017216. Its totient is φ = 852856534080.

The previous prime is 1021121434117. The next prime is 1021121434133. The reversal of 1021121434123 is 3214341211201.

It is a cyclic number.

It is not a de Polignac number, because 1021121434123 - 2³⁷ = 883682480651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021121434133) 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, 11995423 + ... + 12080248.

It is an arithmetic number, because the mean of its divisors is an integer number (74827188576).

Almost surely, 2^{1021121434123} is an apocalyptic number.

1021121434123 is a deficient number, since it is larger than the sum of its proper divisors (176113583093).

1021121434123 is an equidigital number, since it uses as much as digits as its factorization.

1021121434123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24075834.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1021121434123 its reverse (3214341211201), we get a palindrome (4235462645324).

The spelling of 1021121434123 in words is "one trillion, twenty-one billion, one hundred twenty-one million, four hundred thirty-four thousand, one hundred twenty-three".