20211201222120 has 96 divisors (see below), whose sum is σ = 65739765611520. Its totient is φ = 5385275268480.

The previous prime is 20211201222103. The next prime is 20211201222137. The reversal of 20211201222120 is 2122210211202.

It is a happy number.

20211201222120 is a `hidden beast` number, since 20 + 211 + 201 + 22 + 212 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20211201222103) and next prime (20211201222137).

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 = 20211201222093 and 20211201222102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22360344 + ... + 23246663.

It is an arithmetic number, because the mean of its divisors is an integer number (684789225120).

Almost surely, 2^{20211201222120} is an apocalyptic number.

20211201222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211201222120 is an abundant number, since it is smaller than the sum of its proper divisors (45528564389400).

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

20211201222120 is a wasteful number, since it uses less digits than its factorization.

20211201222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45608255 (or 45608248 counting only the distinct ones).

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

Adding to 20211201222120 its reverse (2122210211202), we get a palindrome (22333411433322).

The spelling of 20211201222120 in words is "twenty trillion, two hundred eleven billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty".