20022012100121 has 4 divisors (see below), whose sum is σ = 20712426310500. Its totient is φ = 19331597889744.

The previous prime is 20022012100109. The next prime is 20022012100147. The reversal of 20022012100121 is 12100121022002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5346102362896 + 14675909737225 = 2312164^2 + 3830915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022012100121 - 2¹⁴ = 20022012083737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022012100096 and 20022012100105.

It is not an unprimeable number, because it can be changed into a prime (20022012100421) 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, 345207105146 + ... + 345207105203.

It is an arithmetic number, because the mean of its divisors is an integer number (5178106577625).

Almost surely, 2^{20022012100121} is an apocalyptic number.

It is an amenable number.

20022012100121 is a deficient number, since it is larger than the sum of its proper divisors (690414210379).

20022012100121 is an equidigital number, since it uses as much as digits as its factorization.

20022012100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690414210378.

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

Adding to 20022012100121 its reverse (12100121022002), we get a palindrome (32122133122123).

The spelling of 20022012100121 in words is "twenty trillion, twenty-two billion, twelve million, one hundred thousand, one hundred twenty-one".