1212101 has 8 divisors (see below), whose sum is σ = 1336608. Its totient is φ = 1090000.

The previous prime is 1212061. The next prime is 1212103. The reversal of 1212101 is 1012121.

1212101 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 1212101 - 2¹⁸ = 949957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212103) 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, 566 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (167076).

2^1212101 is an apocalyptic number.

1212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212101 is a deficient number, since it is larger than the sum of its proper divisors (124507).

1212101 is a wasteful number, since it uses less digits than its factorization.

1212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1212101 is about 1100.9545858027. The cubic root of 1212101 is about 106.6218637797.

Adding to 1212101 its reverse (1012121), we get a palindrome (2224222).

It can be divided in two parts, 121 and 2101, that added together give a palindrome (2222).

The spelling of 1212101 in words is "one million, two hundred twelve thousand, one hundred one".