1020111021401 has 2 divisors, whose sum is σ = 1020111021402. Its totient is φ = 1020111021400.

The previous prime is 1020111021253. The next prime is 1020111021403. The reversal of 1020111021401 is 1041201110201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781111278025 + 238999743376 = 883805^2 + 488876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020111021401 is a prime.

Together with 1020111021403, 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 (1020111021403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510055510700 + 510055510701.

It is an arithmetic number, because the mean of its divisors is an integer number (510055510701).

Almost surely, 2^{1020111021401} is an apocalyptic number.

It is an amenable number.

1020111021401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020111021401 is an equidigital number, since it uses as much as digits as its factorization.

1020111021401 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 1020111021401 its reverse (1041201110201), we get a palindrome (2061312131602).

The spelling of 1020111021401 in words is "one trillion, twenty billion, one hundred eleven million, twenty-one thousand, four hundred one".