20102101211220 has 48 divisors (see below), whose sum is σ = 64326723877248. Its totient is φ = 4594765991040.

The previous prime is 20102101211173. The next prime is 20102101211267. The reversal of 20102101211220 is 2211210120102.

It is an interprime number because it is at equal distance from previous prime (20102101211173) and next prime (20102101211267).

It is a super-2 number, since 2×20102101211220² (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 20102101211220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23931072451 + ... + 23931073290.

It is an arithmetic number, because the mean of its divisors is an integer number (1340140080776).

Almost surely, 2^{20102101211220} is an apocalyptic number.

20102101211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102101211220 is an abundant number, since it is smaller than the sum of its proper divisors (44224622666028).

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

20102101211220 is a wasteful number, since it uses less digits than its factorization.

20102101211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47862145760 (or 47862145758 counting only the distinct ones).

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

Adding to 20102101211220 its reverse (2211210120102), we get a palindrome (22313311331322).

The spelling of 20102101211220 in words is "twenty trillion, one hundred two billion, one hundred one million, two hundred eleven thousand, two hundred twenty".