20001220120101 has 8 divisors (see below), whose sum is σ = 29092683811104. Its totient is φ = 12121951587920.

The previous prime is 20001220120081. The next prime is 20001220120121. The reversal of 20001220120101 is 10102102210002.

It is an interprime number because it is at equal distance from previous prime (20001220120081) and next prime (20001220120121).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001220120101 - 2¹⁰ = 20001220119077 is a prime.

It is a super-3 number, since 3×20001220120101³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001220120121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303048789666 + ... + 303048789731.

It is an arithmetic number, because the mean of its divisors is an integer number (3636585476388).

Almost surely, 2^{20001220120101} is an apocalyptic number.

It is an amenable number.

20001220120101 is a deficient number, since it is larger than the sum of its proper divisors (9091463691003).

20001220120101 is a wasteful number, since it uses less digits than its factorization.

20001220120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606097579411.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001220120101 its reverse (10102102210002), we get a palindrome (30103322330103).

The spelling of 20001220120101 in words is "twenty trillion, one billion, two hundred twenty million, one hundred twenty thousand, one hundred one".