10121200001021 has 16 divisors (see below), whose sum is σ = 10280311509888. Its totient is φ = 9963003345600.

The previous prime is 10121200001009. The next prime is 10121200001039. The reversal of 10121200001021 is 12010000212101.

It is a cyclic number.

It is not a de Polignac number, because 10121200001021 - 2³⁰ = 10120126259197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121200000993 and 10121200001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121200001041) 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, 56242016 + ... + 56421686.

It is an arithmetic number, because the mean of its divisors is an integer number (642519469368).

Almost surely, 2^{10121200001021} is an apocalyptic number.

It is an amenable number.

10121200001021 is a deficient number, since it is larger than the sum of its proper divisors (159111508867).

10121200001021 is a wasteful number, since it uses less digits than its factorization.

10121200001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182212.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10121200001021 its reverse (12010000212101), we get a palindrome (22131200213122).

The spelling of 10121200001021 in words is "ten trillion, one hundred twenty-one billion, two hundred million, one thousand, twenty-one".