1000020121 has 8 divisors (see below), whose sum is σ = 1059125760. Its totient is φ = 940945728.

The previous prime is 1000020107. The next prime is 1000020139. The reversal of 1000020121 is 1210200001.

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 1000020121 - 2¹¹ = 1000018073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000020221) 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, 103620 + ... + 112858.

It is an arithmetic number, because the mean of its divisors is an integer number (132390720).

Almost surely, 2^1000020121 is an apocalyptic number.

It is an amenable number.

1000020121 is a deficient number, since it is larger than the sum of its proper divisors (59105639).

1000020121 is an equidigital number, since it uses as much as digits as its factorization.

1000020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15623.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1000020121 is about 31623.0947410275. The cubic root of 1000020121 is about 1000.0067069550.

Adding to 1000020121 its reverse (1210200001), we get a palindrome (2210220122).

The spelling of 1000020121 in words is "one billion, twenty thousand, one hundred twenty-one".