1011022121 has 4 divisors (see below), whose sum is σ = 1011806544. Its totient is φ = 1010237700.

The previous prime is 1011022073. The next prime is 1011022169. The reversal of 1011022121 is 1212201101.

1011022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1011022073) and next prime (1011022169).

It is a cyclic number.

It is not a de Polignac number, because 1011022121 - 2¹⁸ = 1010759977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011022721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390275 + ... + 392856.

It is an arithmetic number, because the mean of its divisors is an integer number (252951636).

Almost surely, 2^1011022121 is an apocalyptic number.

It is an amenable number.

1011022121 is a deficient number, since it is larger than the sum of its proper divisors (784423).

1011022121 is an equidigital number, since it uses as much as digits as its factorization.

1011022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784422.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1011022121 is about 31796.5740450131. The cubic root of 1011022121 is about 1003.6606238156.

Adding to 1011022121 its reverse (1212201101), we get a palindrome (2223223222).

The spelling of 1011022121 in words is "one billion, eleven million, twenty-two thousand, one hundred twenty-one".