1020200012091 has 32 divisors (see below), whose sum is σ = 1628179499520. Its totient is φ = 627618691872.

The previous prime is 1020200012057. The next prime is 1020200012147. The reversal of 1020200012091 is 1902100020201.

1020200012091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1020200012091 - 2¹¹ = 1020200010043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020200010091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670530 + ... + 1577976.

It is an arithmetic number, because the mean of its divisors is an integer number (50880609360).

Almost surely, 2^{1020200012091} is an apocalyptic number.

1020200012091 is a deficient number, since it is larger than the sum of its proper divisors (607979487429).

1020200012091 is a wasteful number, since it uses less digits than its factorization.

1020200012091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910672 (or 910666 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1020200012091 its reverse (1902100020201), we get a palindrome (2922300032292).

The spelling of 1020200012091 in words is "one trillion, twenty billion, two hundred million, twelve thousand, ninety-one".