101621121 has 32 divisors (see below), whose sum is σ = 164706048. Its totient is φ = 54405120.

The previous prime is 101621119. The next prime is 101621123. The reversal of 101621121 is 121126101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101621119) and next prime (101621123).

It is not a de Polignac number, because 101621121 - 2¹ = 101621119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101621121.

It is not an unprimeable number, because it can be changed into a prime (101621123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99811 + ... + 100823.

It is an arithmetic number, because the mean of its divisors is an integer number (5147064).

Almost surely, 2^101621121 is an apocalyptic number.

It is an amenable number.

101621121 is a deficient number, since it is larger than the sum of its proper divisors (63084927).

101621121 is a wasteful number, since it uses less digits than its factorization.

101621121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 101621121 is about 10080.7301818866. The cubic root of 101621121 is about 466.6536428905.

Adding to 101621121 its reverse (121126101), we get a palindrome (222747222).

The spelling of 101621121 in words is "one hundred one million, six hundred twenty-one thousand, one hundred twenty-one".