101021121 has 8 divisors (see below), whose sum is σ = 149660960. Its totient is φ = 67347396.

The previous prime is 101021117. The next prime is 101021131. The reversal of 101021121 is 121120101.

It is a happy number.

It is not a de Polignac number, because 101021121 - 2² = 101021117 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 (101021131) 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, 1870735 + ... + 1870788.

It is an arithmetic number, because the mean of its divisors is an integer number (18707620).

Almost surely, 2^101021121 is an apocalyptic number.

It is an amenable number.

101021121 is a deficient number, since it is larger than the sum of its proper divisors (48639839).

101021121 is an equidigital number, since it uses as much as digits as its factorization.

101021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741532 (or 3741526 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 101021121 is about 10050.9263752154. The cubic root of 101021121 is about 465.7334107943.

Adding to 101021121 its reverse (121120101), we get a palindrome (222141222).

The spelling of 101021121 in words is "one hundred one million, twenty-one thousand, one hundred twenty-one".