202121001020047 has 2 divisors, whose sum is σ = 202121001020048. Its totient is φ = 202121001020046.

The previous prime is 202121001020009. The next prime is 202121001020069. The reversal of 202121001020047 is 740020100121202.

It is an a-pointer prime, because the next prime (202121001020069) can be obtained adding 202121001020047 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202121001020047 - 2¹⁹ = 202121000495759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202121001020347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060500510023 + 101060500510024.

It is an arithmetic number, because the mean of its divisors is an integer number (101060500510024).

Almost surely, 2^{202121001020047} is an apocalyptic number.

202121001020047 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121001020047 is an equidigital number, since it uses as much as digits as its factorization.

202121001020047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 202121001020047 its reverse (740020100121202), we get a palindrome (942141101141249).

The spelling of 202121001020047 in words is "two hundred two trillion, one hundred twenty-one billion, one million, twenty thousand, forty-seven".