1970021968091 has 8 divisors (see below), whose sum is σ = 2004360434160. Its totient is φ = 1935715110912.

The previous prime is 1970021968073. The next prime is 1970021968121. The reversal of 1970021968091 is 1908691200791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1970021968091 - 2⁶ = 1970021968027 is a prime.

It is a super-2 number, since 2×1970021968091² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1970021968021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7776470 + ... + 8025803.

It is an arithmetic number, because the mean of its divisors is an integer number (250545054270).

Almost surely, 2^{1970021968091} is an apocalyptic number.

1970021968091 is a deficient number, since it is larger than the sum of its proper divisors (34338466069).

1970021968091 is a wasteful number, since it uses less digits than its factorization.

1970021968091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15804445.

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 1970021968091 in words is "one trillion, nine hundred seventy billion, twenty-one million, nine hundred sixty-eight thousand, ninety-one".