121212001011 has 16 divisors (see below), whose sum is σ = 164794582944. Its totient is φ = 79221103104.

The previous prime is 121212000989. The next prime is 121212001013. The reversal of 121212001011 is 110100212121.

It is not a de Polignac number, because 121212001011 - 2¹⁴ = 121211984627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212001013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95446 + ... + 501531.

It is an arithmetic number, because the mean of its divisors is an integer number (10299661434).

Almost surely, 2^121212001011 is an apocalyptic number.

121212001011 is a deficient number, since it is larger than the sum of its proper divisors (43582581933).

121212001011 is a wasteful number, since it uses less digits than its factorization.

121212001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598310.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121212001011 its reverse (110100212121), we get a palindrome (231312213132).

The spelling of 121212001011 in words is "one hundred twenty-one billion, two hundred twelve million, one thousand, eleven".