20100020020101 has 48 divisors (see below), whose sum is σ = 33292896464256. Its totient is φ = 11447029807488.

The previous prime is 20100020020097. The next prime is 20100020020103. The reversal of 20100020020101 is 10102002000102.

It is not a de Polignac number, because 20100020020101 - 2² = 20100020020097 is a prime.

It is a super-2 number, since 2×20100020020101² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100020020103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33849706 + ... + 34438388.

It is an arithmetic number, because the mean of its divisors is an integer number (693602009672).

Almost surely, 2^{20100020020101} is an apocalyptic number.

20100020020101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20100020020101 is a deficient number, since it is larger than the sum of its proper divisors (13192876444155).

20100020020101 is a wasteful number, since it uses less digits than its factorization.

20100020020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590522 (or 590519 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100020020101 its reverse (10102002000102), we get a palindrome (30202022020203).

The spelling of 20100020020101 in words is "twenty trillion, one hundred billion, twenty million, twenty thousand, one hundred one".