20001212000121 has 16 divisors (see below), whose sum is σ = 29092747638528. Its totient is φ = 12121915150800.

The previous prime is 20001212000101. The next prime is 20001212000179. The reversal of 20001212000121 is 12100021210002.

It is not a de Polignac number, because 20001212000121 - 2⁵ = 20001212000089 is a prime.

It is a super-3 number, since 3×20001212000121³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001212000097 and 20001212000106.

It is not an unprimeable number, because it can be changed into a prime (20001212000101) 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, 21546786 + ... + 22455876.

It is an arithmetic number, because the mean of its divisors is an integer number (1818296727408).

Almost surely, 2^{20001212000121} is an apocalyptic number.

It is an amenable number.

20001212000121 is a deficient number, since it is larger than the sum of its proper divisors (9091535638407).

20001212000121 is a wasteful number, since it uses less digits than its factorization.

20001212000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575812.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001212000121 its reverse (12100021210002), we get a palindrome (32101233210123).

It can be divided in two parts, 2000 and 1212000121, that added together give a palindrome (1212002121).

The spelling of 20001212000121 in words is "twenty trillion, one billion, two hundred twelve million, one hundred twenty-one", and thus it is an aban number.