120000001021 has 2 divisors, whose sum is σ = 120000001022. Its totient is φ = 120000001020.

The previous prime is 120000000973. The next prime is 120000001097. The reversal of 120000001021 is 120100000021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118976704900 + 1023296121 = 344930^2 + 31989^2 .

It is a cyclic number.

It is not a de Polignac number, because 120000001021 - 2⁷ = 120000000893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120000000995 and 120000001013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120000001321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60000000510 + 60000000511.

It is an arithmetic number, because the mean of its divisors is an integer number (60000000511).

Almost surely, 2^120000001021 is an apocalyptic number.

It is an amenable number.

120000001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120000001021 is an equidigital number, since it uses as much as digits as its factorization.

120000001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 120000001021 its reverse (120100000021), we get a palindrome (240100001042).

The spelling of 120000001021 in words is "one hundred twenty billion, one thousand, twenty-one".