10121201100021 has 16 divisors (see below), whose sum is σ = 14726150968320. Its totient is φ = 6132226308720.

The previous prime is 10121201099959. The next prime is 10121201100071. The reversal of 10121201100021 is 12000110212101.

It is not a de Polignac number, because 10121201100021 - 2¹⁰ = 10121201098997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121201100071) 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, 45762111 + ... + 45982748.

It is an arithmetic number, because the mean of its divisors is an integer number (920384435520).

Almost surely, 2^{10121201100021} is an apocalyptic number.

10121201100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121201100021 is a deficient number, since it is larger than the sum of its proper divisors (4604949868299).

10121201100021 is a wasteful number, since it uses less digits than its factorization.

10121201100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91748216.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10121201100021 its reverse (12000110212101), we get a palindrome (22121311312122).

The spelling of 10121201100021 in words is "ten trillion, one hundred twenty-one billion, two hundred one million, one hundred thousand, twenty-one".