1220212202111 has 16 divisors (see below), whose sum is σ = 1423298976000. Its totient is φ = 1045667599704.

The previous prime is 1220212202107. The next prime is 1220212202141. The reversal of 1220212202111 is 1112022120221.

It is not a de Polignac number, because 1220212202111 - 2² = 1220212202107 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 1220212202111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220212202101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1192400 + ... + 1965258.

It is an arithmetic number, because the mean of its divisors is an integer number (88956186000).

Almost surely, 2^{1220212202111} is an apocalyptic number.

1220212202111 is a deficient number, since it is larger than the sum of its proper divisors (203086773889).

1220212202111 is an frugal number, since it uses more digits than its factorization.

1220212202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777483 (or 777469 counting only the distinct ones).

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

Adding to 1220212202111 its reverse (1112022120221), we get a palindrome (2332234322332).

The spelling of 1220212202111 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred two thousand, one hundred eleven".