1012002121 has 8 divisors (see below), whose sum is σ = 1105199424. Its totient is φ = 920997840.

The previous prime is 1012002113. The next prime is 1012002127. The reversal of 1012002121 is 1212002101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012002121 - 2³ = 1012002113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012002098 and 1012002107.

It is not an unprimeable number, because it can be changed into a prime (1012002127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547291 + ... + 549136.

It is an arithmetic number, because the mean of its divisors is an integer number (138149928).

Almost surely, 2^1012002121 is an apocalyptic number.

It is an amenable number.

1012002121 is a deficient number, since it is larger than the sum of its proper divisors (93197303).

1012002121 is a wasteful number, since it uses less digits than its factorization.

1012002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096511.

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

The square root of 1012002121 is about 31811.9807776881. The cubic root of 1012002121 is about 1003.9848072202.

Adding to 1012002121 its reverse (1212002101), we get a palindrome (2224004222).

The spelling of 1012002121 in words is "one billion, twelve million, two thousand, one hundred twenty-one".