20010211221042 has 96 divisors (see below), whose sum is σ = 50537308378752. Its totient is φ = 5603406412032.

The previous prime is 20010211220963. The next prime is 20010211221043. The reversal of 20010211221042 is 24012211201002.

20010211221042 is a `hidden beast` number, since 200 + 1 + 0 + 211 + 2 + 210 + 42 = 666.

It is a super-2 number, since 2×20010211221042² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20010211221043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4741998 + ... + 7906134.

It is an arithmetic number, because the mean of its divisors is an integer number (526430295612).

Almost surely, 2^{20010211221042} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20010211221042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25268654189376).

20010211221042 is an abundant number, since it is smaller than the sum of its proper divisors (30527097157710).

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

20010211221042 is a wasteful number, since it uses less digits than its factorization.

20010211221042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165152 (or 3165149 counting only the distinct ones).

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

Adding to 20010211221042 its reverse (24012211201002), we get a palindrome (44022422422044).

The spelling of 20010211221042 in words is "twenty trillion, ten billion, two hundred eleven million, two hundred twenty-one thousand, forty-two".