20020221221012 has 12 divisors (see below), whose sum is σ = 35035868789460. Its totient is φ = 10009972995456.

The previous prime is 20020221221009. The next prime is 20020221221023. The reversal of 20020221221012 is 21012212202002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16867416144016 + 3152805076996 = 4106996^2 + 1775614^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34076087 + ... + 34658622.

It is an arithmetic number, because the mean of its divisors is an integer number (2919655732455).

Almost surely, 2^{20020221221012} is an apocalyptic number.

It is an amenable number.

20020221221012 is a deficient number, since it is larger than the sum of its proper divisors (15015647568448).

20020221221012 is a wasteful number, since it uses less digits than its factorization.

20020221221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68807530 (or 68807528 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20020221221012 its reverse (21012212202002), we get a palindrome (41032433423014).

The spelling of 20020221221012 in words is "twenty trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, twelve".