121011202221 has 64 divisors (see below), whose sum is σ = 215946920448. Its totient is φ = 58451632128.

The previous prime is 121011202219. The next prime is 121011202241. The reversal of 121011202221 is 122202110121.

It is not a de Polignac number, because 121011202221 - 2¹ = 121011202219 is a prime.

It is a super-2 number, since 2×121011202221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121011202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011202241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180640 + ... + 524073.

It is an arithmetic number, because the mean of its divisors is an integer number (3374170632).

Almost surely, 2^121011202221 is an apocalyptic number.

It is an amenable number.

121011202221 is a deficient number, since it is larger than the sum of its proper divisors (94935718227).

121011202221 is a wasteful number, since it uses less digits than its factorization.

121011202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704790.

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

Adding to 121011202221 its reverse (122202110121), we get a palindrome (243213312342).

The spelling of 121011202221 in words is "one hundred twenty-one billion, eleven million, two hundred two thousand, two hundred twenty-one".