20020101012121 has 16 divisors (see below), whose sum is σ = 24232030035840. Its totient is φ = 16146652757760.

The previous prime is 20020101012113. The next prime is 20020101012151. The reversal of 20020101012121 is 12121010102002.

It is not a de Polignac number, because 20020101012121 - 2³ = 20020101012113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20020101012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20441191 + ... + 21398188.

It is an arithmetic number, because the mean of its divisors is an integer number (1514501877240).

Almost surely, 2^{20020101012121} is an apocalyptic number.

It is an amenable number.

20020101012121 is a deficient number, since it is larger than the sum of its proper divisors (4211929023719).

20020101012121 is a wasteful number, since it uses less digits than its factorization.

20020101012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41843424.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20020101012121 its reverse (12121010102002), we get a palindrome (32141111114123).

The spelling of 20020101012121 in words is "twenty trillion, twenty billion, one hundred one million, twelve thousand, one hundred twenty-one".