20201211021222 has 128 divisors (see below), whose sum is σ = 57110942592000. Its totient is φ = 5247067744800.

The previous prime is 20201211021191. The next prime is 20201211021263. The reversal of 20201211021222 is 22212011210202.

It is a happy number.

20201211021222 is a `hidden beast` number, since 20 + 201 + 211 + 0 + 212 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20201211021195 and 20201211021204.

It is a congruent number.

It is an unprimeable number.

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, 49371729 + ... + 49779212.

It is an arithmetic number, because the mean of its divisors is an integer number (446179239000).

Almost surely, 2^{20201211021222} is an apocalyptic number.

20201211021222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20201211021222 is an abundant number, since it is smaller than the sum of its proper divisors (36909731570778).

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

20201211021222 is a wasteful number, since it uses less digits than its factorization.

20201211021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99150984 (or 99150964 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20201211021222 its reverse (22212011210202), we get a palindrome (42413222231424).

The spelling of 20201211021222 in words is "twenty trillion, two hundred one billion, two hundred eleven million, twenty-one thousand, two hundred twenty-two".