2021121022201 has 4 divisors (see below), whose sum is σ = 2021125122304. Its totient is φ = 2021116922100.

The previous prime is 2021121022163. The next prime is 2021121022211. The reversal of 2021121022201 is 1022201211202.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-2021121022201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021121022211) 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, 1190505 + ... + 2336566.

It is an arithmetic number, because the mean of its divisors is an integer number (505281280576).

Almost surely, 2^{2021121022201} is an apocalyptic number.

It is an amenable number.

2021121022201 is a deficient number, since it is larger than the sum of its proper divisors (4100103).

2021121022201 is an equidigital number, since it uses as much as digits as its factorization.

2021121022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100102.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021121022201 its reverse (1022201211202), we get a palindrome (3043322233403).

The spelling of 2021121022201 in words is "two trillion, twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred one".