101212210121 has 16 divisors (see below), whose sum is σ = 111899544768. Its totient is φ = 90780705600.

The previous prime is 101212210117. The next prime is 101212210139. The reversal of 101212210121 is 121012212101.

It is a cyclic number.

It is not a de Polignac number, because 101212210121 - 2² = 101212210117 is a prime.

It is a super-2 number, since 2×101212210121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101212210096 and 101212210105.

It is not an unprimeable number, because it can be changed into a prime (101212210111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46295 + ... + 452291.

It is an arithmetic number, because the mean of its divisors is an integer number (6993721548).

Almost surely, 2^101212210121 is an apocalyptic number.

101212210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101212210121 is a deficient number, since it is larger than the sum of its proper divisors (10687334647).

101212210121 is a wasteful number, since it uses less digits than its factorization.

101212210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406312.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101212210121 its reverse (121012212101), we get a palindrome (222224422222).

The spelling of 101212210121 in words is "one hundred one billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".