20210120020901 has 2 divisors, whose sum is σ = 20210120020902. Its totient is φ = 20210120020900.

The previous prime is 20210120020897. The next prime is 20210120020931. The reversal of 20210120020901 is 10902002101202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17470519050625 + 2739600970276 = 4179775^2 + 1655174^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210120020901 - 2² = 20210120020897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210120020931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105060010450 + 10105060010451.

It is an arithmetic number, because the mean of its divisors is an integer number (10105060010451).

Almost surely, 2^{20210120020901} is an apocalyptic number.

It is an amenable number.

20210120020901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210120020901 is an equidigital number, since it uses as much as digits as its factorization.

20210120020901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20210120020901 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, twenty thousand, nine hundred one".