1022212121101 has 4 divisors (see below), whose sum is σ = 1022214169852. Its totient is φ = 1022210072352.

The previous prime is 1022212121057. The next prime is 1022212121129. The reversal of 1022212121101 is 1011212122201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257278215076 + 764933906025 = 507226^2 + 874605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022212121101 - 2²¹ = 1022210023949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022212181101) 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, 265111 + ... + 1454203.

It is an arithmetic number, because the mean of its divisors is an integer number (255553542463).

Almost surely, 2^{1022212121101} is an apocalyptic number.

It is an amenable number.

1022212121101 is a deficient number, since it is larger than the sum of its proper divisors (2048751).

1022212121101 is an equidigital number, since it uses as much as digits as its factorization.

1022212121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1022212121101 its reverse (1011212122201), we get a palindrome (2033424243302).

The spelling of 1022212121101 in words is "one trillion, twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, one hundred one".