20022101221020 has 96 divisors (see below), whose sum is σ = 60807437522496. Its totient is φ = 4902590054400.

The previous prime is 20022101221013. The next prime is 20022101221027. The reversal of 20022101221020 is 2012210122002.

It is an interprime number because it is at equal distance from previous prime (20022101221013) and next prime (20022101221027).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022101221027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239342461 + ... + 239426100.

It is an arithmetic number, because the mean of its divisors is an integer number (633410807526).

Almost surely, 2^{20022101221020} is an apocalyptic number.

20022101221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022101221020 is an abundant number, since it is smaller than the sum of its proper divisors (40785336301476).

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

20022101221020 is a wasteful number, since it uses less digits than its factorization.

20022101221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478768631 (or 478768629 counting only the distinct ones).

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

Adding to 20022101221020 its reverse (2012210122002), we get a palindrome (22034311343022).

The spelling of 20022101221020 in words is "twenty trillion, twenty-two billion, one hundred one million, two hundred twenty-one thousand, twenty".