20123001212021 has 4 divisors (see below), whose sum is σ = 20123951013792. Its totient is φ = 20122051410252.

The previous prime is 20123001212009. The next prime is 20123001212053. The reversal of 20123001212021 is 12021210032102.

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 20123001212021 - 2¹⁰ = 20123001210997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123001211021) 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, 474869105 + ... + 474911478.

It is an arithmetic number, because the mean of its divisors is an integer number (5030987753448).

Almost surely, 2^{20123001212021} is an apocalyptic number.

It is an amenable number.

20123001212021 is a deficient number, since it is larger than the sum of its proper divisors (949801771).

20123001212021 is an equidigital number, since it uses as much as digits as its factorization.

20123001212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949801770.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20123001212021 its reverse (12021210032102), we get a palindrome (32144211244123).

The spelling of 20123001212021 in words is "twenty trillion, one hundred twenty-three billion, one million, two hundred twelve thousand, twenty-one".