121211021011 has 2 divisors, whose sum is σ = 121211021012. Its totient is φ = 121211021010.

The previous prime is 121211020981. The next prime is 121211021021. The reversal of 121211021011 is 110120112121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211021011 is a prime.

It is a super-2 number, since 2×121211021011² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211020982 and 121211021000.

It is not a weakly prime, because it can be changed into another prime (121211021021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605510505 + 60605510506.

It is an arithmetic number, because the mean of its divisors is an integer number (60605510506).

Almost surely, 2^121211021011 is an apocalyptic number.

121211021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211021011 is an equidigital number, since it uses as much as digits as its factorization.

121211021011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 121211021011 its reverse (110120112121), we get a palindrome (231331133132).

The spelling of 121211021011 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, eleven".