1021001122111 has 8 divisors (see below), whose sum is σ = 1021698526464. Its totient is φ = 1020303946200.

The previous prime is 1021001122081. The next prime is 1021001122133. The reversal of 1021001122111 is 1112211001201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021001122111 - 2³⁵ = 986641383743 is a prime.

It is a super-2 number, since 2×1021001122111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021001122091 and 1021001122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021001122171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9413556 + ... + 9521398.

It is an arithmetic number, because the mean of its divisors is an integer number (127712315808).

Almost surely, 2^{1021001122111} is an apocalyptic number.

1021001122111 is a deficient number, since it is larger than the sum of its proper divisors (697404353).

1021001122111 is a wasteful number, since it uses less digits than its factorization.

1021001122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114221.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021001122111 its reverse (1112211001201), we get a palindrome (2133212123312).

The spelling of 1021001122111 in words is "one trillion, twenty-one billion, one million, one hundred twenty-two thousand, one hundred eleven".