1220202211011 has 24 divisors (see below), whose sum is σ = 1892612993040. Its totient is φ = 697238341632.

The previous prime is 1220202211009. The next prime is 1220202211021. The reversal of 1220202211011 is 1101122020221.

It is not a de Polignac number, because 1220202211011 - 2¹ = 1220202211009 is a prime.

It is a super-2 number, since 2×1220202211011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220202211021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6106395 + ... + 6303051.

It is an arithmetic number, because the mean of its divisors is an integer number (78858874710).

Almost surely, 2^{1220202211011} is an apocalyptic number.

1220202211011 is a deficient number, since it is larger than the sum of its proper divisors (672410782029).

1220202211011 is a wasteful number, since it uses less digits than its factorization.

1220202211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238883 (or 238876 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220202211011 its reverse (1101122020221), we get a palindrome (2321324231232).

The spelling of 1220202211011 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred eleven thousand, eleven".