1022212121 has 4 divisors (see below), whose sum is σ = 1168242432. Its totient is φ = 876181812.

The previous prime is 1022212117. The next prime is 1022212127. The reversal of 1022212121 is 1212122201.

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 a cyclic number.

It is not a de Polignac number, because 1022212121 - 2² = 1022212117 is a prime.

1022212121 is a modest number, since divided by 212121 gives 1022 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1022212096 and 1022212105.

It is not an unprimeable number, because it can be changed into a prime (1022212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73015145 + ... + 73015158.

It is an arithmetic number, because the mean of its divisors is an integer number (292060608).

Almost surely, 2^1022212121 is an apocalyptic number.

It is an amenable number.

1022212121 is a deficient number, since it is larger than the sum of its proper divisors (146030311).

1022212121 is an equidigital number, since it uses as much as digits as its factorization.

1022212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146030310.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1022212121 is about 31972.0521862454. The cubic root of 1022212121 is about 1007.3498871433.

Adding to 1022212121 its reverse (1212122201), we get a palindrome (2234334322).

The spelling of 1022212121 in words is "one billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".