201010210021091 has 16 divisors (see below), whose sum is σ = 210237660272640. Its totient is φ = 191965771549440.

The previous prime is 201010210021081. The next prime is 201010210021109. The reversal of 201010210021091 is 190120012010102.

It is a cyclic number.

It is not a de Polignac number, because 201010210021091 - 2¹⁴ = 201010210004707 is a prime.

It is a super-2 number, since 2×201010210021091² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201010210021081) 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, 95278511 + ... + 97365368.

It is an arithmetic number, because the mean of its divisors is an integer number (13139853767040).

Almost surely, 2^{201010210021091} is an apocalyptic number.

201010210021091 is a deficient number, since it is larger than the sum of its proper divisors (9227450251549).

201010210021091 is a wasteful number, since it uses less digits than its factorization.

201010210021091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192644354.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 201010210021091 its reverse (190120012010102), we get a palindrome (391130222031193).

The spelling of 201010210021091 in words is "two hundred one trillion, ten billion, two hundred ten million, twenty-one thousand, ninety-one".