121221000001011 has 32 divisors (see below), whose sum is σ = 171537175180800. Its totient is φ = 75881749962240.

The previous prime is 121221000000979. The next prime is 121221000001019. The reversal of 121221000001011 is 110100000122121.

It is not a de Polignac number, because 121221000001011 - 2⁵ = 121221000000979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221000001019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338589045 + ... + 338946873.

It is an arithmetic number, because the mean of its divisors is an integer number (5360536724400).

Almost surely, 2^{121221000001011} is an apocalyptic number.

121221000001011 is a deficient number, since it is larger than the sum of its proper divisors (50316175179789).

121221000001011 is a wasteful number, since it uses less digits than its factorization.

121221000001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373419.

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

Adding to 121221000001011 its reverse (110100000122121), we get a palindrome (231321000123132).

The spelling of 121221000001011 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one thousand, eleven".