121021212019 has 2 divisors, whose sum is σ = 121021212020. Its totient is φ = 121021212018.

The previous prime is 121021211917. The next prime is 121021212031. The reversal of 121021212019 is 910212120121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021212019 is a prime.

It is a super-2 number, since 2×121021212019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121021212919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510606009 + 60510606010.

It is an arithmetic number, because the mean of its divisors is an integer number (60510606010).

Almost surely, 2^121021212019 is an apocalyptic number.

121021212019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021212019 is an equidigital number, since it uses as much as digits as its factorization.

121021212019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 121021212019 in words is "one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, nineteen".