10201212121 has 8 divisors (see below), whose sum is σ = 10259529984. Its totient is φ = 10143026880.

The previous prime is 10201212089. The next prime is 10201212137. The reversal of 10201212121 is 12121210201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10201212121 - 2⁵ = 10201212089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10201212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123216 + ... + 188638.

It is an arithmetic number, because the mean of its divisors is an integer number (1282441248).

Almost surely, 2^10201212121 is an apocalyptic number.

It is an amenable number.

10201212121 is a deficient number, since it is larger than the sum of its proper divisors (58317863).

10201212121 is an equidigital number, since it uses as much as digits as its factorization.

10201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66311.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10201212121 its reverse (12121210201), we get a palindrome (22322422322).

The spelling of 10201212121 in words is "ten billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".