101213121 has 8 divisors (see below), whose sum is σ = 142889184. Its totient is φ = 63506240.

The previous prime is 101213111. The next prime is 101213129. The reversal of 101213121 is 121312101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101213121 - 2¹⁴ = 101196737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101213097 and 101213106.

It is not an unprimeable number, because it can be changed into a prime (101213129) 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, 992235 + ... + 992336.

It is an arithmetic number, because the mean of its divisors is an integer number (17861148).

Almost surely, 2^101213121 is an apocalyptic number.

It is an amenable number.

101213121 is a deficient number, since it is larger than the sum of its proper divisors (41676063).

101213121 is a wasteful number, since it uses less digits than its factorization.

101213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984591.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 101213121 is about 10060.4731996065. The cubic root of 101213121 is about 466.0282805631.

Adding to 101213121 its reverse (121312101), we get a palindrome (222525222).

The spelling of 101213121 in words is "one hundred one million, two hundred thirteen thousand, one hundred twenty-one".