202121000121001 has 64 divisors (see below), whose sum is σ = 236609040729600. Its totient is φ = 170950800900096.

The previous prime is 202121000120981. The next prime is 202121000121013. The reversal of 202121000121001 is 100121000121202.

It is a cyclic number.

It is not a de Polignac number, because 202121000121001 - 2¹⁵ = 202121000088233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121000121041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4209339345 + ... + 4209387361.

It is an arithmetic number, because the mean of its divisors is an integer number (3697016261400).

Almost surely, 2^{202121000121001} is an apocalyptic number.

It is an amenable number.

202121000121001 is a deficient number, since it is larger than the sum of its proper divisors (34488040608599).

202121000121001 is a wasteful number, since it uses less digits than its factorization.

202121000121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49538.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202121000121001 its reverse (100121000121202), we get a palindrome (302242000242203).

The spelling of 202121000121001 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred twenty-one thousand, one".