10122012121 has 16 divisors (see below), whose sum is σ = 11067114240. Its totient is φ = 9201003840.

The previous prime is 10122012119. The next prime is 10122012137. The reversal of 10122012121 is 12121022101.

It is a cyclic number.

It is not a de Polignac number, because 10122012121 - 2¹ = 10122012119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (10122012181) 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, 842271 + ... + 854203.

It is an arithmetic number, because the mean of its divisors is an integer number (691694640).

Almost surely, 2^10122012121 is an apocalyptic number.

It is an amenable number.

10122012121 is a deficient number, since it is larger than the sum of its proper divisors (945102119).

10122012121 is a wasteful number, since it uses less digits than its factorization.

10122012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936.

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

Adding to 10122012121 its reverse (12121022101), we get a palindrome (22243034222).

The spelling of 10122012121 in words is "ten billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".