10220121 has 8 divisors (see below), whose sum is σ = 15140960. Its totient is φ = 6813396.

The previous prime is 10220107. The next prime is 10220129. The reversal of 10220121 is 12102201.

It is not a de Polignac number, because 10220121 - 2⁶ = 10220057 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 (10220129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189235 + ... + 189288.

It is an arithmetic number, because the mean of its divisors is an integer number (1892620).

Almost surely, 2^10220121 is an apocalyptic number.

It is an amenable number.

10220121 is a deficient number, since it is larger than the sum of its proper divisors (4920839).

10220121 is an equidigital number, since it uses as much as digits as its factorization.

10220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378532 (or 378526 counting only the distinct ones).

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

The square root of 10220121 is about 3196.8923973134. The cubic root of 10220121 is about 217.0127977049.

Adding to 10220121 its reverse (12102201), we get a palindrome (22322322).

The spelling of 10220121 in words is "ten million, two hundred twenty thousand, one hundred twenty-one".