210201112220021 has 16 divisors (see below), whose sum is σ = 226653307062000. Its totient is φ = 193789479863808.

The previous prime is 210201112219993. The next prime is 210201112220059. The reversal of 210201112220021 is 120022211102012.

It can be written as a sum of positive squares in 8 ways, for example, as 67231980639121 + 142969131580900 = 8199511^2 + 11956970^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201112220021 - 2³⁸ = 209926234313077 is a prime.

It is a super-2 number, since 2×210201112220021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201112220081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30217175 + ... + 36516843.

It is an arithmetic number, because the mean of its divisors is an integer number (14165831691375).

Almost surely, 2^{210201112220021} is an apocalyptic number.

It is an amenable number.

210201112220021 is a deficient number, since it is larger than the sum of its proper divisors (16452194841979).

210201112220021 is a wasteful number, since it uses less digits than its factorization.

210201112220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6302888.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210201112220021 its reverse (120022211102012), we get a palindrome (330223323322033).

The spelling of 210201112220021 in words is "two hundred ten trillion, two hundred one billion, one hundred twelve million, two hundred twenty thousand, twenty-one".