1209970201643 has 32 divisors (see below), whose sum is σ = 1409758276608. Its totient is φ = 1017171792000.

The previous prime is 1209970201639. The next prime is 1209970201651. The reversal of 1209970201643 is 3461020799021.

It is not a de Polignac number, because 1209970201643 - 2² = 1209970201639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209970201594 and 1209970201603.

It is not an unprimeable number, because it can be changed into a prime (1209970201603) 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, 27255821 + ... + 27300177.

It is an arithmetic number, because the mean of its divisors is an integer number (44054946144).

Almost surely, 2^{1209970201643} is an apocalyptic number.

1209970201643 is a deficient number, since it is larger than the sum of its proper divisors (199788074965).

1209970201643 is a wasteful number, since it uses less digits than its factorization.

1209970201643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44843.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 1209970201643 in words is "one trillion, two hundred nine billion, nine hundred seventy million, two hundred one thousand, six hundred forty-three".