20012221020120 has 384 divisors, whose sum is σ = 71491887498240. Its totient is φ = 4466021253120.

The previous prime is 20012221019957. The next prime is 20012221020131. The reversal of 20012221020120 is 2102012221002.

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 20012221020120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 675320824 + ... + 675350456.

It is an arithmetic number, because the mean of its divisors is an integer number (186176790360).

Almost surely, 2^{20012221020120} is an apocalyptic number.

20012221020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012221020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35745943749120).

20012221020120 is an abundant number, since it is smaller than the sum of its proper divisors (51479666478120).

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

20012221020120 is a wasteful number, since it uses less digits than its factorization.

20012221020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32375 (or 32364 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012221020120 its reverse (2102012221002), we get a palindrome (22114233241122).

The spelling of 20012221020120 in words is "twenty trillion, twelve billion, two hundred twenty-one million, twenty thousand, one hundred twenty".