121021220211 has 8 divisors (see below), whose sum is σ = 161601394320. Its totient is φ = 80560929792.

The previous prime is 121021220207. The next prime is 121021220231. The reversal of 121021220211 is 112022120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121021220211 - 2² = 121021220207 is a prime.

It is a super-2 number, since 2×121021220211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021220231) 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, 29968566 + ... + 29972603.

It is an arithmetic number, because the mean of its divisors is an integer number (20200174290).

Almost surely, 2^121021220211 is an apocalyptic number.

121021220211 is a deficient number, since it is larger than the sum of its proper divisors (40580174109).

121021220211 is an equidigital number, since it uses as much as digits as its factorization.

121021220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59941845.

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

Adding to 121021220211 its reverse (112022120121), we get a palindrome (233043340332).

The spelling of 121021220211 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred eleven".