1111021020001 has 4 divisors (see below), whose sum is σ = 1114222810032. Its totient is φ = 1107819229972.

The previous prime is 1111021019987. The next prime is 1111021020047. The reversal of 1111021020001 is 1000201201111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111021020001 - 2⁷ = 1111021019873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111021020001.

It is not an unprimeable number, because it can be changed into a prime (1111021023001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600894495 + ... + 1600895188.

It is an arithmetic number, because the mean of its divisors is an integer number (278555702508).

Almost surely, 2^{1111021020001} is an apocalyptic number.

It is an amenable number.

1111021020001 is a deficient number, since it is larger than the sum of its proper divisors (3201790031).

1111021020001 is an equidigital number, since it uses as much as digits as its factorization.

1111021020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201790030.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1111021020001 its reverse (1000201201111), we get a palindrome (2111222221112).

The spelling of 1111021020001 in words is "one trillion, one hundred eleven billion, twenty-one million, twenty thousand, one".