211211102022121 has 8 divisors (see below), whose sum is σ = 212571688589064. Its totient is φ = 209850709036800.

The previous prime is 211211102022097. The next prime is 211211102022127. The reversal of 211211102022121 is 121220201112112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59848867802025 + 151362234220096 = 7736205^2 + 12302936^2 .

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 211211102022121 - 2²³ = 211211093633513 is a prime.

It is a super-2 number, since 2×211211102022121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211102022127) 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, 46205920 + ... + 50570833.

It is an arithmetic number, because the mean of its divisors is an integer number (26571461073633).

Almost surely, 2^{211211102022121} is an apocalyptic number.

It is an amenable number.

211211102022121 is a deficient number, since it is larger than the sum of its proper divisors (1360586566943).

211211102022121 is a wasteful number, since it uses less digits than its factorization.

211211102022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96790811.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211211102022121 its reverse (121220201112112), we get a palindrome (332431303134233).

The spelling of 211211102022121 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred two million, twenty-two thousand, one hundred twenty-one".