20010122121220 has 48 divisors (see below), whose sum is σ = 52390137921408. Its totient is φ = 6236921180160.

The previous prime is 20010122121217. The next prime is 20010122121257. The reversal of 20010122121220 is 2212122101002.

It is a happy number.

It is a super-2 number, since 2×20010122121220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20010122121194 and 20010122121203.

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, 6496791357 + ... + 6496794436.

It is an arithmetic number, because the mean of its divisors is an integer number (1091461206696).

Almost surely, 2^{20010122121220} is an apocalyptic number.

20010122121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010122121220 is an abundant number, since it is smaller than the sum of its proper divisors (32380015800188).

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

20010122121220 is a wasteful number, since it uses less digits than its factorization.

20010122121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12993585820 (or 12993585818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20010122121220 its reverse (2212122101002), we get a palindrome (22222244222222).

The spelling of 20010122121220 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".