121022021211 has 64 divisors (see below), whose sum is σ = 201902840832. Its totient is φ = 62779318272.

The previous prime is 121022021209. The next prime is 121022021249. The reversal of 121022021211 is 112120220121.

It is not a de Polignac number, because 121022021211 - 2¹ = 121022021209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121022021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7026336 + ... + 7043538.

It is an arithmetic number, because the mean of its divisors is an integer number (3154731888).

Almost surely, 2^121022021211 is an apocalyptic number.

121022021211 is a deficient number, since it is larger than the sum of its proper divisors (80880819621).

121022021211 is a wasteful number, since it uses less digits than its factorization.

121022021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121022021211 its reverse (112120220121), we get a palindrome (233142241332).

The spelling of 121022021211 in words is "one hundred twenty-one billion, twenty-two million, twenty-one thousand, two hundred eleven".