1021220122211 has 8 divisors (see below), whose sum is σ = 1022674601184. Its totient is φ = 1019765859840.

The previous prime is 1021220122207. The next prime is 1021220122261. The reversal of 1021220122211 is 1122210221201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021220122211 - 2² = 1021220122207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021220122211.

It is not an unprimeable number, because it can be changed into a prime (1021220122201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10965635 + ... + 11058371.

It is an arithmetic number, because the mean of its divisors is an integer number (127834325148).

Almost surely, 2^{1021220122211} is an apocalyptic number.

1021220122211 is a deficient number, since it is larger than the sum of its proper divisors (1454478973).

1021220122211 is an equidigital number, since it uses as much as digits as its factorization.

1021220122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108301.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021220122211 its reverse (1122210221201), we get a palindrome (2143430343412).

The spelling of 1021220122211 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred eleven".