121210211011 has 8 divisors (see below), whose sum is σ = 121642151904. Its totient is φ = 120778394880.

The previous prime is 121210210993. The next prime is 121210211027. The reversal of 121210211011 is 110112012121.

It is a happy number.

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 121210211011 - 2¹¹ = 121210208963 is a prime.

It is a super-2 number, since 2×121210211011² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121210210982 and 121210211000.

It is not an unprimeable number, because it can be changed into a prime (121210211081) 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, 2196915 + ... + 2251411.

It is an arithmetic number, because the mean of its divisors is an integer number (15205268988).

Almost surely, 2^121210211011 is an apocalyptic number.

121210211011 is a deficient number, since it is larger than the sum of its proper divisors (431940893).

121210211011 is an equidigital number, since it uses as much as digits as its factorization.

121210211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62381.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121210211011 its reverse (110112012121), we get a palindrome (231322223132).

The spelling of 121210211011 in words is "one hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, eleven".