20001202202101 has 4 divisors (see below), whose sum is σ = 20002660986304. Its totient is φ = 19999743417900.

The previous prime is 20001202202089. The next prime is 20001202202123. The reversal of 20001202202101 is 10120220210002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20001202202101 - 2²³ = 20001193813493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001202208101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729371535 + ... + 729398956.

It is an arithmetic number, because the mean of its divisors is an integer number (5000665246576).

Almost surely, 2^{20001202202101} is an apocalyptic number.

It is an amenable number.

20001202202101 is a deficient number, since it is larger than the sum of its proper divisors (1458784203).

20001202202101 is a wasteful number, since it uses less digits than its factorization.

20001202202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458784202.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001202202101 its reverse (10120220210002), we get a palindrome (30121422412103).

The spelling of 20001202202101 in words is "twenty trillion, one billion, two hundred two million, two hundred two thousand, one hundred one".