20021202011121 has 16 divisors (see below), whose sum is σ = 26711971227840. Its totient is φ = 13338951030720.

The previous prime is 20021202011119. The next prime is 20021202011201. The reversal of 20021202011121 is 12111020212002.

It is not a de Polignac number, because 20021202011121 - 2¹ = 20021202011119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021202011121.

It is not an unprimeable number, because it can be changed into a prime (20021202011621) 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, 162220191 + ... + 162343563.

It is an arithmetic number, because the mean of its divisors is an integer number (1669498201740).

Almost surely, 2^{20021202011121} is an apocalyptic number.

It is an amenable number.

20021202011121 is a deficient number, since it is larger than the sum of its proper divisors (6690769216719).

20021202011121 is a wasteful number, since it uses less digits than its factorization.

20021202011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157456.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021202011121 its reverse (12111020212002), we get a palindrome (32132222223123).

The spelling of 20021202011121 in words is "twenty trillion, twenty-one billion, two hundred two million, eleven thousand, one hundred twenty-one".