121002111012221 has 8 divisors (see below), whose sum is σ = 128241785104704. Its totient is φ = 113775981681600.

The previous prime is 121002111012217. The next prime is 121002111012271. The reversal of 121002111012221 is 122210111200121.

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

It is not a de Polignac number, because 121002111012221 - 2² = 121002111012217 is a prime.

It is a super-2 number, since 2×121002111012221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121002111012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002111012271) 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, 3386172065 + ... + 3386207798.

It is an arithmetic number, because the mean of its divisors is an integer number (16030223138088).

Almost surely, 2^{121002111012221} is an apocalyptic number.

It is an amenable number.

121002111012221 is a deficient number, since it is larger than the sum of its proper divisors (7239674092483).

121002111012221 is a wasteful number, since it uses less digits than its factorization.

121002111012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772380931.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121002111012221 its reverse (122210111200121), we get a palindrome (243212222212342).

The spelling of 121002111012221 in words is "one hundred twenty-one trillion, two billion, one hundred eleven million, twelve thousand, two hundred twenty-one".