1011222211001 has 4 divisors (see below), whose sum is σ = 1055188394112. Its totient is φ = 967256027892.

The previous prime is 1011222210949. The next prime is 1011222211003. The reversal of 1011222211001 is 1001122221101.

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 1011222211001 - 2³⁰ = 1010148469177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011222211003) 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, 21983091521 + ... + 21983091566.

It is an arithmetic number, because the mean of its divisors is an integer number (263797098528).

Almost surely, 2^{1011222211001} is an apocalyptic number.

It is an amenable number.

1011222211001 is a deficient number, since it is larger than the sum of its proper divisors (43966183111).

1011222211001 is an equidigital number, since it uses as much as digits as its factorization.

1011222211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43966183110.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011222211001 its reverse (1001122221101), we get a palindrome (2012344432102).

It can be divided in two parts, 101122221100 and 1, that added together give a palindrome (101122221101).

The spelling of 1011222211001 in words is "one trillion, eleven billion, two hundred twenty-two million, two hundred eleven thousand, one".