211213022101121 has 4 divisors (see below), whose sum is σ = 223637317518852. Its totient is φ = 198788726683392.

The previous prime is 211213022101033. The next prime is 211213022101141. The reversal of 211213022101121 is 121101220312112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153656750138896 + 57556271962225 = 12395836^2 + 7586585^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213022101121 - 2²² = 211213017906817 is a prime.

It is a super-2 number, since 2×211213022101121² (a number of 29 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 = 211213022101093 and 211213022101102.

It is not an unprimeable number, because it can be changed into a prime (211213022101141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6212147708840 + ... + 6212147708873.

It is an arithmetic number, because the mean of its divisors is an integer number (55909329379713).

Almost surely, 2^{211213022101121} is an apocalyptic number.

It is an amenable number.

211213022101121 is a deficient number, since it is larger than the sum of its proper divisors (12424295417731).

211213022101121 is a wasteful number, since it uses less digits than its factorization.

211213022101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12424295417730.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211213022101121 its reverse (121101220312112), we get a palindrome (332314242413233).

The spelling of 211213022101121 in words is "two hundred eleven trillion, two hundred thirteen billion, twenty-two million, one hundred one thousand, one hundred twenty-one".