1211111220202 has 64 divisors (see below), whose sum is σ = 2089596579840. Its totient is φ = 522074798784.

The previous prime is 1211111220167. The next prime is 1211111220269. The reversal of 1211111220202 is 2020221111121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123087999 + ... + 123097837.

It is an arithmetic number, because the mean of its divisors is an integer number (32649946560).

Almost surely, 2^{1211111220202} is an apocalyptic number.

1211111220202 is a deficient number, since it is larger than the sum of its proper divisors (878485359638).

1211111220202 is a wasteful number, since it uses less digits than its factorization.

1211111220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14707.

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

Adding to 1211111220202 its reverse (2020221111121), we get a palindrome (3231332331323).

The spelling of 1211111220202 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty thousand, two hundred two".