1020112112121 has 16 divisors (see below), whose sum is σ = 1419968638080. Its totient is φ = 650193589760.

The previous prime is 1020112112101. The next prime is 1020112112177. The reversal of 1020112112121 is 1212112110201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020112112121 - 2¹³ = 1020112103929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020112112121.

It is not an unprimeable number, because it can be changed into a prime (1020112112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3408606 + ... + 3695783.

It is an arithmetic number, because the mean of its divisors is an integer number (88748039880).

Almost surely, 2^{1020112112121} is an apocalyptic number.

It is an amenable number.

1020112112121 is a deficient number, since it is larger than the sum of its proper divisors (399856525959).

1020112112121 is a wasteful number, since it uses less digits than its factorization.

1020112112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106496.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1020112112121 its reverse (1212112110201), we get a palindrome (2232224222322).

The spelling of 1020112112121 in words is "one trillion, twenty billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".