211212210121 has 8 divisors (see below), whose sum is σ = 230430038688. Its totient is φ = 191997168000.

The previous prime is 211212210113. The next prime is 211212210229. The reversal of 211212210121 is 121012212112.

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

It is not a de Polignac number, because 211212210121 - 2³ = 211212210113 is a prime.

It is a super-2 number, since 2×211212210121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211212210095 and 211212210104.

It is not an unprimeable number, because it can be changed into a prime (211212210421) 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, 536515 + ... + 842776.

It is an arithmetic number, because the mean of its divisors is an integer number (28803754836).

Almost surely, 2^211212210121 is an apocalyptic number.

It is an amenable number.

211212210121 is a deficient number, since it is larger than the sum of its proper divisors (19217828567).

211212210121 is a wasteful number, since it uses less digits than its factorization.

211212210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393223.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212210121 its reverse (121012212112), we get a palindrome (332224422233).

The spelling of 211212210121 in words is "two hundred eleven billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".