20101202111220 has 96 divisors (see below), whose sum is σ = 57596131942272. Its totient is φ = 5235311897088.

The previous prime is 20101202111201. The next prime is 20101202111257. The reversal of 20101202111220 is 2211120210102.

It is a super-2 number, since 2×20101202111220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20101202111220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39512794 + ... + 40018286.

It is an arithmetic number, because the mean of its divisors is an integer number (599959707732).

Almost surely, 2^{20101202111220} is an apocalyptic number.

20101202111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101202111220 is an abundant number, since it is smaller than the sum of its proper divisors (37494929831052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101202111220 is a wasteful number, since it uses less digits than its factorization.

20101202111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520961 (or 520959 counting only the distinct ones).

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

Adding to 20101202111220 its reverse (2211120210102), we get a palindrome (22312322321322).

The spelling of 20101202111220 in words is "twenty trillion, one hundred one billion, two hundred two million, one hundred eleven thousand, two hundred twenty".