121101022421 has 4 divisors (see below), whose sum is σ = 123917325312. Its totient is φ = 118284719532.

The previous prime is 121101022417. The next prime is 121101022423. The reversal of 121101022421 is 124220101121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124220101121 = 19 ⋅6537900059.

It is a cyclic number.

It is not a de Polignac number, because 121101022421 - 2² = 121101022417 is a prime.

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 121101022421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101022423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408151381 + ... + 1408151466.

It is an arithmetic number, because the mean of its divisors is an integer number (30979331328).

Almost surely, 2^121101022421 is an apocalyptic number.

It is an amenable number.

121101022421 is a deficient number, since it is larger than the sum of its proper divisors (2816302891).

121101022421 is an equidigital number, since it uses as much as digits as its factorization.

121101022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816302890.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121101022421 its reverse (124220101121), we get a palindrome (245321123542).

The spelling of 121101022421 in words is "one hundred twenty-one billion, one hundred one million, twenty-two thousand, four hundred twenty-one".