121222021001 has 2 divisors, whose sum is σ = 121222021002. Its totient is φ = 121222021000.

The previous prime is 121222020967. The next prime is 121222021003. The reversal of 121222021001 is 100120222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115790478400 + 5431542601 = 340280^2 + 73699^2 .

It is an emirp because it is prime and its reverse (100120222121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121222021001 is a prime.

Together with 121222021003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121222021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611010500 + 60611010501.

It is an arithmetic number, because the mean of its divisors is an integer number (60611010501).

Almost surely, 2^121222021001 is an apocalyptic number.

It is an amenable number.

121222021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222021001 is an equidigital number, since it uses as much as digits as its factorization.

121222021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121222021001 its reverse (100120222121), we get a palindrome (221342243122).

The spelling of 121222021001 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, one".