1011001120421 has 2 divisors, whose sum is σ = 1011001120422. Its totient is φ = 1011001120420.

The previous prime is 1011001120403. The next prime is 1011001120427. The reversal of 1011001120421 is 1240211001101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582092702500 + 428908417921 = 762950^2 + 654911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011001120421 - 2²² = 1010996926117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011001120396 and 1011001120405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011001120427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505500560210 + 505500560211.

It is an arithmetic number, because the mean of its divisors is an integer number (505500560211).

Almost surely, 2^{1011001120421} is an apocalyptic number.

It is an amenable number.

1011001120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011001120421 is an equidigital number, since it uses as much as digits as its factorization.

1011001120421 is an evil number, because the sum of its binary digits is even.

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

Adding to 1011001120421 its reverse (1240211001101), we get a palindrome (2251212121522).

The spelling of 1011001120421 in words is "one trillion, eleven billion, one million, one hundred twenty thousand, four hundred twenty-one".