20210100211220 has 12 divisors (see below), whose sum is σ = 42441210443604. Its totient is φ = 8084040084480.

The previous prime is 20210100211151. The next prime is 20210100211229. The reversal of 20210100211220 is 2211200101202.

It can be written as a sum of positive squares in 2 ways, for example, as 8249555817616 + 11960544393604 = 2872204^2 + 3458402^2 .

It is a super-2 number, since 2×20210100211220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210100211195 and 20210100211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210100211229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505252505261 + ... + 505252505300.

It is an arithmetic number, because the mean of its divisors is an integer number (3536767536967).

Almost surely, 2^{20210100211220} is an apocalyptic number.

20210100211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210100211220 is an abundant number, since it is smaller than the sum of its proper divisors (22231110232384).

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

20210100211220 is a wasteful number, since it uses less digits than its factorization.

20210100211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010505010570 (or 1010505010568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20210100211220 its reverse (2211200101202), we get a palindrome (22421300312422).

The spelling of 20210100211220 in words is "twenty trillion, two hundred ten billion, one hundred million, two hundred eleven thousand, two hundred twenty".