20010212020121 has 4 divisors (see below), whose sum is σ = 20130033649152. Its totient is φ = 19890390391092.

The previous prime is 20010212020037. The next prime is 20010212020159. The reversal of 20010212020121 is 12102021201002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20010212020121 - 2¹⁴ = 20010212003737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010212020096 and 20010212020105.

It is not an unprimeable number, because it can be changed into a prime (20010212020621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59910814265 + ... + 59910814598.

It is an arithmetic number, because the mean of its divisors is an integer number (5032508412288).

Almost surely, 2^{20010212020121} is an apocalyptic number.

It is an amenable number.

20010212020121 is a deficient number, since it is larger than the sum of its proper divisors (119821629031).

20010212020121 is a wasteful number, since it uses less digits than its factorization.

20010212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119821629030.

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

Adding to 20010212020121 its reverse (12102021201002), we get a palindrome (32112233221123).

The spelling of 20010212020121 in words is "twenty trillion, ten billion, two hundred twelve million, twenty thousand, one hundred twenty-one".