20010012220121 has 16 divisors (see below), whose sum is σ = 25456681334400. Its totient is φ = 15592217311440.

The previous prime is 20010012220117. The next prime is 20010012220123. The reversal of 20010012220121 is 12102221001002.

It is not a de Polignac number, because 20010012220121 - 2² = 20010012220117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010012220096 and 20010012220105.

It is not an unprimeable number, because it can be changed into a prime (20010012220123) 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, 2651733866 + ... + 2651741411.

It is an arithmetic number, because the mean of its divisors is an integer number (1591042583400).

Almost surely, 2^{20010012220121} is an apocalyptic number.

It is an amenable number.

20010012220121 is a deficient number, since it is larger than the sum of its proper divisors (5446669114279).

20010012220121 is an equidigital number, since it uses as much as digits as its factorization.

20010012220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303475309 (or 5303475295 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20010012220121 its reverse (12102221001002), we get a palindrome (32112233221123).

The spelling of 20010012220121 in words is "twenty trillion, ten billion, twelve million, two hundred twenty thousand, one hundred twenty-one".