20111021221202 has 16 divisors (see below), whose sum is σ = 31941117099000. Its totient is φ = 9463985276928.

The previous prime is 20111021221177. The next prime is 20111021221231. The reversal of 20111021221202 is 20212212011102.

It can be written as a sum of positive squares in 4 ways, for example, as 19713502320121 + 397518901081 = 4439989^2 + 630491^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23489918 + ... + 24331014.

Almost surely, 2^{20111021221202} is an apocalyptic number.

20111021221202 is a deficient number, since it is larger than the sum of its proper divisors (11830095877798).

20111021221202 is a wasteful number, since it uses less digits than its factorization.

20111021221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544365.

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

Adding to 20111021221202 its reverse (20212212011102), we get a palindrome (40323233232304).

The spelling of 20111021221202 in words is "twenty trillion, one hundred eleven billion, twenty-one million, two hundred twenty-one thousand, two hundred two".