1012210121 has 6 divisors (see below), whose sum is σ = 1096062030. Its totient is φ = 934347648.

The previous prime is 1012210099. The next prime is 1012210139. The reversal of 1012210121 is 1210122101.

1012210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 138180025 + 874030096 = 11755^2 + 29564^2 .

It is not a de Polignac number, because 1012210121 - 2⁶ = 1012210057 is a prime.

It is a super-3 number, since 3×1012210121³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012210021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2994536 + ... + 2994873.

It is an arithmetic number, because the mean of its divisors is an integer number (182677005).

Almost surely, 2^1012210121 is an apocalyptic number.

It is an amenable number.

1012210121 is a deficient number, since it is larger than the sum of its proper divisors (83851909).

1012210121 is an equidigital number, since it uses as much as digits as its factorization.

1012210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989435 (or 5989422 counting only the distinct ones).

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

The square root of 1012210121 is about 31815.2498182868. The cubic root of 1012210121 is about 1004.0535865670.

Adding to 1012210121 its reverse (1210122101), we get a palindrome (2222332222).

The spelling of 1012210121 in words is "one billion, twelve million, two hundred ten thousand, one hundred twenty-one".