1220231011211 has 8 divisors (see below), whose sum is σ = 1248654455664. Its totient is φ = 1191809656800.

The previous prime is 1220231011127. The next prime is 1220231011217. The reversal of 1220231011211 is 1121101320221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220231011211 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 1220231011211.

It is not an unprimeable number, because it can be changed into a prime (1220231011217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691205 + ... + 1708281.

It is an arithmetic number, because the mean of its divisors is an integer number (156081806958).

Almost surely, 2^{1220231011211} is an apocalyptic number.

1220231011211 is a deficient number, since it is larger than the sum of its proper divisors (28423444453).

1220231011211 is a wasteful number, since it uses less digits than its factorization.

1220231011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045021.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1220231011211 its reverse (1121101320221), we get a palindrome (2341332331432).

The spelling of 1220231011211 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, eleven thousand, two hundred eleven".