20021022020121 has 16 divisors (see below), whose sum is σ = 28121581674240. Its totient is φ = 12635000272080.

The previous prime is 20021022020117. The next prime is 20021022020123. The reversal of 20021022020121 is 12102022012002.

It is not a de Polignac number, because 20021022020121 - 2² = 20021022020117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021022020121.

It is not an unprimeable number, because it can be changed into a prime (20021022020123) 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, 136811515 + ... + 136957776.

It is an arithmetic number, because the mean of its divisors is an integer number (1757598854640).

Almost surely, 2^{20021022020121} is an apocalyptic number.

It is an amenable number.

20021022020121 is a deficient number, since it is larger than the sum of its proper divisors (8100559654119).

20021022020121 is a wasteful number, since it uses less digits than its factorization.

20021022020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273770596.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20021022020121 its reverse (12102022012002), we get a palindrome (32123044032123).

The spelling of 20021022020121 in words is "twenty trillion, twenty-one billion, twenty-two million, twenty thousand, one hundred twenty-one".