910020612121 has 4 divisors (see below), whose sum is σ = 910078366644. Its totient is φ = 909962857600.

The previous prime is 910020612119. The next prime is 910020612203. The reversal of 910020612121 is 121216020019.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 680354426896 + 229666185225 = 824836^2 + 479235^2 .

It is a cyclic number.

It is not a de Polignac number, because 910020612121 - 2¹ = 910020612119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (910020616121) 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, 28853620 + ... + 28885141.

It is an arithmetic number, because the mean of its divisors is an integer number (227519591661).

Almost surely, 2^910020612121 is an apocalyptic number.

It is an amenable number.

910020612121 is a deficient number, since it is larger than the sum of its proper divisors (57754523).

910020612121 is a wasteful number, since it uses less digits than its factorization.

910020612121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57754522.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 910020612121 in words is "nine hundred ten billion, twenty million, six hundred twelve thousand, one hundred twenty-one".