101220201 has 24 divisors (see below), whose sum is σ = 154749920. Its totient is φ = 63576576.

The previous prime is 101220169. The next prime is 101220233. The reversal of 101220201 is 102022101.

It is an interprime number because it is at equal distance from previous prime (101220169) and next prime (101220233).

It is not a de Polignac number, because 101220201 - 2⁵ = 101220169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31470 + ... + 34536.

Almost surely, 2^101220201 is an apocalyptic number.

It is an amenable number.

101220201 is a deficient number, since it is larger than the sum of its proper divisors (53529719).

101220201 is a wasteful number, since it uses less digits than its factorization.

101220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 101220201 is about 10060.8250655699. The cubic root of 101220201 is about 466.0391467540.

Adding to 101220201 its reverse (102022101), we get a palindrome (203242302).

The spelling of 101220201 in words is "one hundred one million, two hundred twenty thousand, two hundred one".