20122121102201 has 16 divisors (see below), whose sum is σ = 21528772189440. Its totient is φ = 18750239665920.

The previous prime is 20122121102131. The next prime is 20122121102203. The reversal of 20122121102201 is 10220112122102.

It is a cyclic number.

It is not a de Polignac number, because 20122121102201 - 2²⁶ = 20122053993337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122121102201.

It is not an unprimeable number, because it can be changed into a prime (20122121102203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97789841 + ... + 97995393.

It is an arithmetic number, because the mean of its divisors is an integer number (1345548261840).

Almost surely, 2^{20122121102201} is an apocalyptic number.

It is an amenable number.

20122121102201 is a deficient number, since it is larger than the sum of its proper divisors (1406651087239).

20122121102201 is a wasteful number, since it uses less digits than its factorization.

20122121102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290096.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20122121102201 its reverse (10220112122102), we get a palindrome (30342233224303).

The spelling of 20122121102201 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, two hundred one".