20001211102121 has 8 divisors (see below), whose sum is σ = 20152019160000. Its totient is φ = 19850845947120.

The previous prime is 20001211102087. The next prime is 20001211102127. The reversal of 20001211102121 is 12120111210002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001211102121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001211102096 and 20001211102105.

It is not an unprimeable number, because it can be changed into a prime (20001211102127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110635061 + ... + 110815698.

It is an arithmetic number, because the mean of its divisors is an integer number (2519002395000).

Almost surely, 2^{20001211102121} is an apocalyptic number.

It is an amenable number.

20001211102121 is a deficient number, since it is larger than the sum of its proper divisors (150808057879).

20001211102121 is a wasteful number, since it uses less digits than its factorization.

20001211102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221451439.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20001211102121 its reverse (12120111210002), we get a palindrome (32121322312123).

The spelling of 20001211102121 in words is "twenty trillion, one billion, two hundred eleven million, one hundred two thousand, one hundred twenty-one".