22101021210020 has 24 divisors (see below), whose sum is σ = 46417888246968. Its totient is φ = 8839314444800.

The previous prime is 22101021210001. The next prime is 22101021210031. The reversal of 22101021210020 is 2001212010122.

It can be written as a sum of positive squares in 4 ways, for example, as 3556301985856 + 18544719224164 = 1885816^2 + 4306358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22101021209977 and 22101021210004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68211791 + ... + 68535030.

It is an arithmetic number, because the mean of its divisors is an integer number (1934078676957).

Almost surely, 2^{22101021210020} is an apocalyptic number.

22101021210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101021210020 is an abundant number, since it is smaller than the sum of its proper divisors (24316867036948).

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

22101021210020 is a wasteful number, since it uses less digits than its factorization.

22101021210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136754911 (or 136754909 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22101021210020 its reverse (2001212010122), we get a palindrome (24102233220142).

The spelling of 22101021210020 in words is "twenty-two trillion, one hundred one billion, twenty-one million, two hundred ten thousand, twenty".