102012121 has 32 divisors (see below), whose sum is σ = 118972800. Its totient is φ = 86860800.

The previous prime is 102012091. The next prime is 102012133. The reversal of 102012121 is 121210201.

It is a cyclic number.

It is not a de Polignac number, because 102012121 - 2²⁵ = 68457689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102012098 and 102012107.

It is not an unprimeable number, because it can be changed into a prime (102012181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1009971 + ... + 1010071.

It is an arithmetic number, because the mean of its divisors is an integer number (3717900).

Almost surely, 2^102012121 is an apocalyptic number.

It is an amenable number.

102012121 is a deficient number, since it is larger than the sum of its proper divisors (16960679).

102012121 is a wasteful number, since it uses less digits than its factorization.

102012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 102012121 is about 10100.1049994542. The cubic root of 102012121 is about 467.2513797157.

Adding to 102012121 its reverse (121210201), we get a palindrome (223222322).

The spelling of 102012121 in words is "one hundred two million, twelve thousand, one hundred twenty-one".