220111121001021 has 64 divisors (see below), whose sum is σ = 315673113600000. Its totient is φ = 136005315060672.

The previous prime is 220111121000993. The next prime is 220111121001029. The reversal of 220111121001021 is 120100121111022.

It is a happy number.

It is not a de Polignac number, because 220111121001021 - 2¹⁰ = 220111120999997 is a prime.

It is a super-2 number, since 2×220111121001021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111121001029) 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 63 ways as a sum of consecutive naturals, for example, 1968755280 + ... + 1968867078.

It is an arithmetic number, because the mean of its divisors is an integer number (4932392400000).

Almost surely, 2^{220111121001021} is an apocalyptic number.

It is an amenable number.

220111121001021 is a deficient number, since it is larger than the sum of its proper divisors (95561992598979).

220111121001021 is a wasteful number, since it uses less digits than its factorization.

220111121001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114686.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 220111121001021 its reverse (120100121111022), we get a palindrome (340211242112043).

The spelling of 220111121001021 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred twenty-one million, one thousand, twenty-one".