20021122211202 has 192 divisors, whose sum is σ = 50487208611840. Its totient is φ = 5616119826432.

The previous prime is 20021122211183. The next prime is 20021122211239. The reversal of 20021122211202 is 20211222112002.

It is a happy number.

20021122211202 is a `hidden beast` number, since 20 + 0 + 211 + 22 + 211 + 202 = 666.

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

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, 2097106593 + ... + 2097116139.

It is an arithmetic number, because the mean of its divisors is an integer number (262954211520).

Almost surely, 2^{20021122211202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021122211202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25243604305920).

20021122211202 is an abundant number, since it is smaller than the sum of its proper divisors (30466086400638).

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

20021122211202 is a wasteful number, since it uses less digits than its factorization.

20021122211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10877 (or 10874 counting only the distinct ones).

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

Adding to 20021122211202 its reverse (20211222112002), we get a palindrome (40232344323204).

The spelling of 20021122211202 in words is "twenty trillion, twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred two".