1011012121 has 16 divisors (see below), whose sum is σ = 1170476928. Its totient is φ = 855360000.

The previous prime is 1011012103. The next prime is 1011012139. The reversal of 1011012121 is 1212101101.

It is an interprime number because it is at equal distance from previous prime (1011012103) and next prime (1011012139).

It is a cyclic number.

It is not a de Polignac number, because 1011012121 - 2⁷ = 1011011993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011012098 and 1011012107.

It is not an unprimeable number, because it can be changed into a prime (1011012521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247546 + ... + 251596.

It is an arithmetic number, because the mean of its divisors is an integer number (73154808).

Almost surely, 2^1011012121 is an apocalyptic number.

It is an amenable number.

1011012121 is a deficient number, since it is larger than the sum of its proper divisors (159464807).

1011012121 is a wasteful number, since it uses less digits than its factorization.

1011012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1011012121 is about 31796.4167949786. The cubic root of 1011012121 is about 1003.6573147422.

Adding to 1011012121 its reverse (1212101101), we get a palindrome (2223113222).

The spelling of 1011012121 in words is "one billion, eleven million, twelve thousand, one hundred twenty-one".