121011012221 has 8 divisors (see below), whose sum is σ = 132026213088. Its totient is φ = 109998178000.

The previous prime is 121011012197. The next prime is 121011012233. The reversal of 121011012221 is 122210110121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121011012221 is a prime.

It is a super-2 number, since 2×121011012221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121011012196 and 121011012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011012251) 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, 483890 + ... + 690051.

It is an arithmetic number, because the mean of its divisors is an integer number (16503276636).

Almost surely, 2^121011012221 is an apocalyptic number.

121011012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121011012221 is a deficient number, since it is larger than the sum of its proper divisors (11015200867).

121011012221 is a wasteful number, since it uses less digits than its factorization.

121011012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183323.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121011012221 its reverse (122210110121), we get a palindrome (243221122342).

The spelling of 121011012221 in words is "one hundred twenty-one billion, eleven million, twelve thousand, two hundred twenty-one".