20012201120121 has 16 divisors (see below), whose sum is σ = 30502890937728. Its totient is φ = 11432502892800.

The previous prime is 20012201120117. The next prime is 20012201120137. The reversal of 20012201120121 is 12102110221002.

It is not a de Polignac number, because 20012201120121 - 2² = 20012201120117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012201120121.

It is not an unprimeable number, because it can be changed into a prime (20012201170121) 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, 126610990 + ... + 126768951.

It is an arithmetic number, because the mean of its divisors is an integer number (1906430683608).

Almost surely, 2^{20012201120121} is an apocalyptic number.

20012201120121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20012201120121 is a deficient number, since it is larger than the sum of its proper divisors (10490689817607).

20012201120121 is a wasteful number, since it uses less digits than its factorization.

20012201120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253383712.

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

Adding to 20012201120121 its reverse (12102110221002), we get a palindrome (32114311341123).

The spelling of 20012201120121 in words is "twenty trillion, twelve billion, two hundred one million, one hundred twenty thousand, one hundred twenty-one".