1012110020091 has 12 divisors (see below), whose sum is σ = 1461945712968. Its totient is φ = 674735851584.

The previous prime is 1012110019981. The next prime is 1012110020237. The reversal of 1012110020091 is 1900200112101.

It is a happy number.

It is not a de Polignac number, because 1012110020091 - 2¹¹ = 1012110018043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012110000091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2107536 + ... + 2542818.

It is an arithmetic number, because the mean of its divisors is an integer number (121828809414).

Almost surely, 2^{1012110020091} is an apocalyptic number.

1012110020091 is a deficient number, since it is larger than the sum of its proper divisors (449835692877).

1012110020091 is a wasteful number, since it uses less digits than its factorization.

1012110020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693642 (or 693639 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1012110020091 its reverse (1900200112101), we get a palindrome (2912310132192).

The spelling of 1012110020091 in words is "one trillion, twelve billion, one hundred ten million, twenty thousand, ninety-one".