121221012211 has 8 divisors (see below), whose sum is σ = 130593897504. Its totient is φ = 111855011520.

The previous prime is 121221012197. The next prime is 121221012217. The reversal of 121221012211 is 112210122121.

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 121221012211 - 2⁵ = 121221012179 is a prime.

It is a super-2 number, since 2×121221012211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221012217) 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, 1684546 + ... + 1755031.

It is an arithmetic number, because the mean of its divisors is an integer number (16324237188).

Almost surely, 2^121221012211 is an apocalyptic number.

121221012211 is a deficient number, since it is larger than the sum of its proper divisors (9372885293).

121221012211 is a wasteful number, since it uses less digits than its factorization.

121221012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442301.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221012211 its reverse (112210122121), we get a palindrome (233431134332).

It can be divided in two parts, 1 and 21221012211, that added together give a palindrome (21221012212).

The spelling of 121221012211 in words is "one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, two hundred eleven".