1000022121 has 12 divisors (see below), whose sum is σ = 1650830272. Its totient is φ = 571441176.

The previous prime is 1000022081. The next prime is 1000022173. The reversal of 1000022121 is 1212200001.

1000022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000022121 - 2⁶ = 1000022057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000023121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7936621 + ... + 7936746.

Almost surely, 2^1000022121 is an apocalyptic number.

It is an amenable number.

1000022121 is a deficient number, since it is larger than the sum of its proper divisors (650808151).

1000022121 is a wasteful number, since it uses less digits than its factorization.

1000022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15873380 (or 15873377 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1000022121 is about 31623.1263634701. The cubic root of 1000022121 is about 1000.0073736123.

Adding to 1000022121 its reverse (1212200001), we get a palindrome (2212222122).

The spelling of 1000022121 in words is "one billion, twenty-two thousand, one hundred twenty-one".