1012002022091 has 16 divisors (see below), whose sum is σ = 1067891005440. Its totient is φ = 957144693120.

The previous prime is 1012002022069. The next prime is 1012002022123. The reversal of 1012002022091 is 1902202002101.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012002022091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012002022991) 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, 624326 + ... + 1553636.

It is an arithmetic number, because the mean of its divisors is an integer number (66743187840).

Almost surely, 2^{1012002022091} is an apocalyptic number.

1012002022091 is a deficient number, since it is larger than the sum of its proper divisors (55888983349).

1012002022091 is a wasteful number, since it uses less digits than its factorization.

1012002022091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929866.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1012002022091 its reverse (1902202002101), we get a palindrome (2914204024192).

The spelling of 1012002022091 in words is "one trillion, twelve billion, two million, twenty-two thousand, ninety-one".