1011122110021 has 16 divisors (see below), whose sum is σ = 1069272849600. Its totient is φ = 953466691968.

The previous prime is 1011122110007. The next prime is 1011122110049. The reversal of 1011122110021 is 1200112211101.

It is a happy number.

It is not a de Polignac number, because 1011122110021 - 2¹⁵ = 1011122077253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011122109983 and 1011122110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011122110321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20630481 + ... + 20679433.

It is an arithmetic number, because the mean of its divisors is an integer number (66829553100).

Almost surely, 2^{1011122110021} is an apocalyptic number.

It is an amenable number.

1011122110021 is a deficient number, since it is larger than the sum of its proper divisors (58150739579).

1011122110021 is a wasteful number, since it uses less digits than its factorization.

1011122110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53988.

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

Adding to 1011122110021 its reverse (1200112211101), we get a palindrome (2211234321122).

The spelling of 1011122110021 in words is "one trillion, eleven billion, one hundred twenty-two million, one hundred ten thousand, twenty-one".