1211211201022 has 4 divisors (see below), whose sum is σ = 1816816801536. Its totient is φ = 605605600510.

The previous prime is 1211211200989. The next prime is 1211211201023. The reversal of 1211211201022 is 2201021121121.

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

It is a junction number, because it is equal to n+sod(n) for n = 1211211200987 and 1211211201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211211201023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302802800254 + ... + 302802800257.

It is an arithmetic number, because the mean of its divisors is an integer number (454204200384).

Almost surely, 2^{1211211201022} is an apocalyptic number.

1211211201022 is a deficient number, since it is larger than the sum of its proper divisors (605605600514).

1211211201022 is an equidigital number, since it uses as much as digits as its factorization.

1211211201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605605600513.

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

Adding to 1211211201022 its reverse (2201021121121), we get a palindrome (3412232322143).

The spelling of 1211211201022 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred one thousand, twenty-two".